diff --git a/src/CoreBundle/Migrations/Schema/V200/Version20241230175100.php b/src/CoreBundle/Migrations/Schema/V200/Version20241230175100.php
new file mode 100644
index 00000000000..edbc30656e4
--- /dev/null
+++ b/src/CoreBundle/Migrations/Schema/V200/Version20241230175100.php
@@ -0,0 +1,69 @@
+<?php
+
+declare(strict_types=1);
+
+/* For licensing terms, see /license.txt */
+
+namespace Chamilo\CoreBundle\Migrations\Schema\V200;
+
+use Chamilo\CoreBundle\Migrations\AbstractMigrationChamilo;
+use Doctrine\DBAL\Schema\Schema;
+
+final class Version20241230175100 extends AbstractMigrationChamilo
+{
+    public function getDescription(): string
+    {
+        return 'Fix cascading delete for c_lp_category_rel_user table foreign key dynamically';
+    }
+
+    public function up(Schema $schema): void
+    {
+        // Find the foreign key name dynamically
+        $foreignKeyName = $this->getForeignKeyName('c_lp_category_rel_user', 'user_id');
+
+        if ($foreignKeyName) {
+            $this->addSql("ALTER TABLE c_lp_category_rel_user DROP FOREIGN KEY `$foreignKeyName`");
+        }
+
+        // Add the updated foreign key
+        $this->addSql('
+            ALTER TABLE c_lp_category_rel_user
+            ADD CONSTRAINT FK_83D35829A76ED395
+            FOREIGN KEY (user_id)
+            REFERENCES user(id)
+            ON DELETE SET NULL
+            ON UPDATE CASCADE
+        ');
+    }
+
+    public function down(Schema $schema): void
+    {
+        $this->addSql('ALTER TABLE c_lp_category_rel_user DROP FOREIGN KEY FK_83D35829A76ED395');
+
+        $this->addSql('
+            ALTER TABLE c_lp_category_rel_user
+            ADD CONSTRAINT c_lp_category_rel_user_ibfk_1
+            FOREIGN KEY (user_id)
+            REFERENCES user(id)
+            ON DELETE SET NULL
+        ');
+    }
+
+    private function getForeignKeyName(string $tableName, string $columnName): ?string
+    {
+        $query = "
+            SELECT CONSTRAINT_NAME
+            FROM information_schema.KEY_COLUMN_USAGE
+            WHERE TABLE_NAME = :tableName
+            AND COLUMN_NAME = :columnName
+            AND TABLE_SCHEMA = DATABASE()
+        ";
+
+        $result = $this->connection->fetchOne($query, [
+            'tableName' => $tableName,
+            'columnName' => $columnName,
+        ]);
+
+        return $result ?: null;
+    }
+}
diff --git a/src/CoreBundle/Repository/Node/UserRepository.php b/src/CoreBundle/Repository/Node/UserRepository.php
index 805f9687318..81251aa4d31 100644
--- a/src/CoreBundle/Repository/Node/UserRepository.php
+++ b/src/CoreBundle/Repository/Node/UserRepository.php
@@ -144,178 +144,195 @@ public function getRootUser(): User
 
     public function deleteUser(User $user, bool $destroy = false): void
     {
-        $em = $this->getEntityManager();
-        $em->getConnection()->beginTransaction();
+        $connection = $this->getEntityManager()->getConnection();
+        $connection->beginTransaction();
 
         try {
             if ($destroy) {
                 $fallbackUser = $this->getFallbackUser();
 
                 if ($fallbackUser) {
-                    $this->reassignUserResourcesToFallback($user, $fallbackUser);
-                    $em->flush();
-                }
-
-                foreach ($user->getGroups() as $group) {
-                    $user->removeGroup($group);
+                    $this->reassignUserResourcesToFallbackSQL($user, $fallbackUser, $connection);
                 }
 
-                if ($user->getResourceNode()) {
-                    $em->remove($user->getResourceNode());
-                }
-
-                $em->remove($user);
+                // Remove group relationships
+                $connection->executeStatement(
+                    'DELETE FROM usergroup_rel_user WHERE user_id = :userId',
+                    ['userId' => $user->getId()]
+                );
+
+                // Remove resource node if exists
+                $connection->executeStatement(
+                    'DELETE FROM resource_node WHERE id = :nodeId',
+                    ['nodeId' => $user->getResourceNode()->getId()]
+                );
+
+                // Remove the user itself
+                $connection->executeStatement(
+                    'DELETE FROM user WHERE id = :userId',
+                    ['userId' => $user->getId()]
+                );
             } else {
-                $user->setActive(User::SOFT_DELETED);
-                $em->persist($user);
+                // Soft delete the user
+                $connection->executeStatement(
+                    'UPDATE user SET active = :softDeleted WHERE id = :userId',
+                    ['softDeleted' => User::SOFT_DELETED, 'userId' => $user->getId()]
+                );
             }
 
-            $em->flush();
-            $em->getConnection()->commit();
+            $connection->commit();
         } catch (Exception $e) {
-            $em->getConnection()->rollBack();
-
+            $connection->rollBack();
             throw $e;
         }
     }
 
-    protected function reassignUserResourcesToFallback(User $userToDelete, User $fallbackUser): void
+    /**
+     * Reassigns resources and related data from a deleted user to a fallback user in the database.
+     */
+    protected function reassignUserResourcesToFallbackSQL(User $userToDelete, User $fallbackUser, $connection): void
     {
-        $em = $this->getEntityManager();
-
-        $userResourceNodes = $em->getRepository(ResourceNode::class)->findBy(['creator' => $userToDelete]);
-        foreach ($userResourceNodes as $resourceNode) {
-            $resourceNode->setCreator($fallbackUser);
-            $em->persist($resourceNode);
-        }
-
-        $childResourceNodes = $em->getRepository(ResourceNode::class)->findBy(['parent' => $userToDelete->getResourceNode()]);
-        foreach ($childResourceNodes as $childNode) {
-            $fallbackUserResourceNode = $fallbackUser->getResourceNode();
-            if ($fallbackUserResourceNode) {
-                $childNode->setParent($fallbackUserResourceNode);
-            } else {
-                $childNode->setParent(null);
-            }
-            $em->persist($childNode);
-        }
-
-        $relations = [
-            ['bundle' => 'CoreBundle', 'entity' => 'AccessUrlRelUser', 'field' => 'user', 'type' => 'object', 'action' => 'delete'],
-            ['bundle' => 'CoreBundle', 'entity' => 'Admin', 'field' => 'user', 'type' => 'object', 'action' => 'delete'],
-            ['bundle' => 'CoreBundle', 'entity' => 'AttemptFeedback', 'field' => 'user', 'type' => 'object', 'action' => 'convert'],
-            ['bundle' => 'CoreBundle', 'entity' => 'Chat', 'field' => 'toUser', 'type' => 'int', 'action' => 'convert'],
-            ['bundle' => 'CoreBundle', 'entity' => 'ChatVideo', 'field' => 'toUser', 'type' => 'int', 'action' => 'convert'],
-            ['bundle' => 'CoreBundle', 'entity' => 'CourseRelUser', 'field' => 'user', 'type' => 'object', 'action' => 'delete'],
-            ['bundle' => 'CoreBundle', 'entity' => 'CourseRelUserCatalogue', 'field' => 'user', 'type' => 'object', 'action' => 'delete'],
-            ['bundle' => 'CoreBundle', 'entity' => 'CourseRequest', 'field' => 'user', 'type' => 'object', 'action' => 'convert'],
-            ['bundle' => 'CourseBundle', 'entity' => 'CAttendanceResult', 'field' => 'user', 'type' => 'object', 'action' => 'delete'],
-            ['bundle' => 'CourseBundle', 'entity' => 'CAttendanceResultComment', 'field' => 'userId', 'type' => 'int', 'action' => 'convert'],
-            ['bundle' => 'CourseBundle', 'entity' => 'CAttendanceSheet', 'field' => 'user', 'type' => 'object', 'action' => 'delete'],
-            ['bundle' => 'CourseBundle', 'entity' => 'CAttendanceSheetLog', 'field' => 'user', 'type' => 'object', 'action' => 'delete'],
-            ['bundle' => 'CourseBundle', 'entity' => 'CChatConnected', 'field' => 'userId', 'type' => 'int', 'action' => 'delete'],
-            ['bundle' => 'CourseBundle', 'entity' => 'CDropboxCategory', 'field' => 'userId', 'type' => 'int', 'action' => 'convert'],
-            ['bundle' => 'CourseBundle', 'entity' => 'CDropboxFeedback', 'field' => 'authorUserId', 'type' => 'int', 'action' => 'convert'],
-            ['bundle' => 'CourseBundle', 'entity' => 'CDropboxPerson', 'field' => 'userId', 'type' => 'int', 'action' => 'convert'],
-            ['bundle' => 'CourseBundle', 'entity' => 'CDropboxPost', 'field' => 'destUserId', 'type' => 'int', 'action' => 'convert'],
-            ['bundle' => 'CourseBundle', 'entity' => 'CForumMailcue', 'field' => 'userId', 'type' => 'int', 'action' => 'delete'],
-            ['bundle' => 'CourseBundle', 'entity' => 'CForumNotification', 'field' => 'userId', 'type' => 'int', 'action' => 'delete'],
-            ['bundle' => 'CourseBundle', 'entity' => 'CForumPost', 'field' => 'user', 'type' => 'object', 'action' => 'convert'],
-            ['bundle' => 'CourseBundle', 'entity' => 'CForumThread', 'field' => 'user', 'type' => 'object', 'action' => 'convert'],
-            ['bundle' => 'CourseBundle', 'entity' => 'CForumThreadQualify', 'field' => 'user', 'type' => 'object', 'action' => 'convert'],
-            ['bundle' => 'CourseBundle', 'entity' => 'CForumThreadQualifyLog', 'field' => 'userId', 'type' => 'int', 'action' => 'convert'],
-            ['bundle' => 'CourseBundle', 'entity' => 'CGroupRelTutor', 'field' => 'user', 'type' => 'object', 'action' => 'convert'],
-            ['bundle' => 'CourseBundle', 'entity' => 'CGroupRelUser', 'field' => 'user', 'type' => 'object', 'action' => 'convert'],
-            ['bundle' => 'CourseBundle', 'entity' => 'CLpCategoryRelUser', 'field' => 'user', 'type' => 'object', 'action' => 'delete'],
-            ['bundle' => 'CourseBundle', 'entity' => 'CLpRelUser', 'field' => 'user', 'type' => 'object', 'action' => 'delete'],
-            ['bundle' => 'CourseBundle', 'entity' => 'CLpView', 'field' => 'user', 'type' => 'object', 'action' => 'delete'],
-            ['bundle' => 'CourseBundle', 'entity' => 'CStudentPublicationComment', 'field' => 'user', 'type' => 'object', 'action' => 'delete'],
-            ['bundle' => 'CourseBundle', 'entity' => 'CStudentPublicationRelUser', 'field' => 'user', 'type' => 'object', 'action' => 'delete'],
-            ['bundle' => 'CourseBundle', 'entity' => 'CSurveyInvitation', 'field' => 'user', 'type' => 'object', 'action' => 'convert'],
-            ['bundle' => 'CourseBundle', 'entity' => 'CWiki', 'field' => 'userId', 'type' => 'int', 'action' => 'convert'],
-            ['bundle' => 'CourseBundle', 'entity' => 'CWikiMailcue', 'field' => 'userId', 'type' => 'int', 'action' => 'delete'],
-            ['bundle' => 'CoreBundle', 'entity' => 'ExtraFieldSavedSearch', 'field' => 'user', 'type' => 'object', 'action' => 'delete'],
-            ['bundle' => 'CoreBundle', 'entity' => 'GradebookCategory', 'field' => 'user', 'type' => 'object', 'action' => 'convert'],
-            ['bundle' => 'CoreBundle', 'entity' => 'GradebookCertificate', 'field' => 'user', 'type' => 'object', 'action' => 'delete'],
-            ['bundle' => 'CoreBundle', 'entity' => 'GradebookComment', 'field' => 'user', 'type' => 'object', 'action' => 'convert'],
-            ['bundle' => 'CoreBundle', 'entity' => 'GradebookLinkevalLog', 'field' => 'user', 'type' => 'object', 'action' => 'delete'],
-            ['bundle' => 'CoreBundle', 'entity' => 'GradebookResult', 'field' => 'user', 'type' => 'object', 'action' => 'delete'],
-            ['bundle' => 'CoreBundle', 'entity' => 'GradebookResultLog', 'field' => 'user', 'type' => 'object', 'action' => 'delete'],
-            ['bundle' => 'CoreBundle', 'entity' => 'GradebookScoreLog', 'field' => 'user', 'type' => 'object', 'action' => 'delete'],
-            ['bundle' => 'CoreBundle', 'entity' => 'Message', 'field' => 'sender', 'type' => 'object', 'action' => 'convert'],
-            ['bundle' => 'CoreBundle', 'entity' => 'MessageRelUser', 'field' => 'receiver', 'type' => 'object', 'action' => 'delete'],
-            ['bundle' => 'CoreBundle', 'entity' => 'MessageTag', 'field' => 'user', 'type' => 'object', 'action' => 'delete'],
-            ['bundle' => 'CoreBundle', 'entity' => 'Notification', 'field' => 'destUserId', 'type' => 'int', 'action' => 'delete'],
-            ['bundle' => 'CoreBundle', 'entity' => 'PageCategory', 'field' => 'creator', 'type' => 'object', 'action' => 'convert'],
-            // ['bundle' => 'CoreBundle', 'entity' => 'PersonalAgenda', 'field' => 'user', 'type' => 'object', 'action' => 'delete'],
-            ['bundle' => 'CoreBundle', 'entity' => 'Portfolio', 'field' => 'user', 'type' => 'object', 'action' => 'convert'],
-            ['bundle' => 'CoreBundle', 'entity' => 'PortfolioCategory', 'field' => 'user', 'type' => 'object', 'action' => 'convert'],
-            ['bundle' => 'CoreBundle', 'entity' => 'PortfolioComment', 'field' => 'author', 'type' => 'object', 'action' => 'convert'],
-            ['bundle' => 'CoreBundle', 'entity' => 'ResourceComment', 'field' => 'author', 'type' => 'object', 'action' => 'convert'],
-            ['bundle' => 'CoreBundle', 'entity' => 'SequenceValue', 'field' => 'user', 'type' => 'object', 'action' => 'convert'],
-            ['bundle' => 'CoreBundle', 'entity' => 'SessionRelCourseRelUser', 'field' => 'user', 'type' => 'object', 'action' => 'delete'],
-            ['bundle' => 'CoreBundle', 'entity' => 'SessionRelUser', 'field' => 'user', 'type' => 'object', 'action' => 'delete'],
-            ['bundle' => 'CoreBundle', 'entity' => 'SkillRelItemRelUser', 'field' => 'user', 'type' => 'object', 'action' => 'delete'],
-            ['bundle' => 'CoreBundle', 'entity' => 'SkillRelUser', 'field' => 'user', 'type' => 'object', 'action' => 'delete'],
-            ['bundle' => 'CoreBundle', 'entity' => 'SkillRelUserComment', 'field' => 'feedbackGiver', 'type' => 'object', 'action' => 'delete'],
-            ['bundle' => 'CoreBundle', 'entity' => 'SocialPost', 'field' => 'sender', 'type' => 'object', 'action' => 'convert'],
-            ['bundle' => 'CoreBundle', 'entity' => 'SocialPost', 'field' => 'userReceiver', 'type' => 'object', 'action' => 'convert'],
-            ['bundle' => 'CoreBundle', 'entity' => 'SocialPostAttachment', 'field' => 'insertUserId', 'type' => 'int', 'action' => 'convert'],
-            ['bundle' => 'CoreBundle', 'entity' => 'SocialPostFeedback', 'field' => 'user', 'type' => 'object', 'action' => 'convert'],
-            ['bundle' => 'CoreBundle', 'entity' => 'Templates', 'field' => 'user', 'type' => 'object', 'action' => 'convert'],
-            ['bundle' => 'CoreBundle', 'entity' => 'TicketAssignedLog', 'field' => 'user', 'type' => 'object', 'action' => 'convert'],
-            ['bundle' => 'CoreBundle', 'entity' => 'TicketCategory', 'field' => 'insertUserId', 'type' => 'int', 'action' => 'convert'],
-            ['bundle' => 'CoreBundle', 'entity' => 'TicketCategoryRelUser', 'field' => 'user', 'type' => 'object', 'action' => 'delete'],
-            ['bundle' => 'CoreBundle', 'entity' => 'TicketMessage', 'field' => 'insertUserId', 'type' => 'int', 'action' => 'convert'],
-            ['bundle' => 'CoreBundle', 'entity' => 'TicketMessageAttachment', 'field' => 'lastEditUserId', 'type' => 'int', 'action' => 'convert'],
-            ['bundle' => 'CoreBundle', 'entity' => 'TicketPriority', 'field' => 'insertUserId', 'type' => 'int', 'action' => 'convert'],
-            ['bundle' => 'CoreBundle', 'entity' => 'TicketProject', 'field' => 'insertUserId', 'type' => 'int', 'action' => 'convert'],
-            ['bundle' => 'CoreBundle', 'entity' => 'TicketProject', 'field' => 'lastEditUserId', 'type' => 'int', 'action' => 'convert'],
-            ['bundle' => 'CoreBundle', 'entity' => 'TrackEAccess', 'field' => 'accessUserId', 'type' => 'int', 'action' => 'delete'],
-            ['bundle' => 'CoreBundle', 'entity' => 'TrackEAccessComplete', 'field' => 'user', 'type' => 'object', 'action' => 'delete'],
-            ['bundle' => 'CoreBundle', 'entity' => 'TrackEAttempt', 'field' => 'user', 'type' => 'object', 'action' => 'delete'],
-            ['bundle' => 'CoreBundle', 'entity' => 'TrackECourseAccess', 'field' => 'user', 'type' => 'object', 'action' => 'delete'],
-            ['bundle' => 'CoreBundle', 'entity' => 'TrackEDefault', 'field' => 'defaultUserId', 'type' => 'int', 'action' => 'convert'],
-            ['bundle' => 'CoreBundle', 'entity' => 'TrackEDownloads', 'field' => 'downUserId', 'type' => 'int', 'action' => 'delete'],
-            ['bundle' => 'CoreBundle', 'entity' => 'TrackEExercise', 'field' => 'user', 'type' => 'object', 'action' => 'delete'],
-            ['bundle' => 'CoreBundle', 'entity' => 'TrackEExerciseConfirmation', 'field' => 'user', 'type' => 'object', 'action' => 'delete'],
-            ['bundle' => 'CoreBundle', 'entity' => 'TrackEHotpotatoes', 'field' => 'exeUserId', 'type' => 'int', 'action' => 'delete'],
-            ['bundle' => 'CoreBundle', 'entity' => 'TrackEHotspot', 'field' => 'hotspotUserId', 'type' => 'int', 'action' => 'delete'],
-            ['bundle' => 'CoreBundle', 'entity' => 'TrackELastaccess', 'field' => 'accessUserId', 'type' => 'int', 'action' => 'delete'],
-            ['bundle' => 'CoreBundle', 'entity' => 'TrackELinks', 'field' => 'linksUserId', 'type' => 'int', 'action' => 'delete'],
-            ['bundle' => 'CoreBundle', 'entity' => 'TrackELogin', 'field' => 'user', 'type' => 'object', 'action' => 'delete'],
-            ['bundle' => 'CoreBundle', 'entity' => 'TrackEOnline', 'field' => 'loginUserId', 'type' => 'int', 'action' => 'delete'],
-            ['bundle' => 'CoreBundle', 'entity' => 'TrackEUploads', 'field' => 'uploadUserId', 'type' => 'int', 'action' => 'delete'],
-            ['bundle' => 'CoreBundle', 'entity' => 'UsergroupRelUser', 'field' => 'user', 'type' => 'object', 'action' => 'convert'],
-            ['bundle' => 'CoreBundle', 'entity' => 'UserRelTag', 'field' => 'user', 'type' => 'object', 'action' => 'delete'],
-            ['bundle' => 'CoreBundle', 'entity' => 'UserRelUser', 'field' => 'user', 'type' => 'object', 'action' => 'delete'],
-        ];
+        // Update resource nodes created by the user
+        $connection->executeStatement(
+            'UPDATE resource_node SET creator_id = :fallbackUserId WHERE creator_id = :userId',
+            ['fallbackUserId' => $fallbackUser->getId(), 'userId' => $userToDelete->getId()]
+        );
+
+        // Update child resource nodes
+        $connection->executeStatement(
+            'UPDATE resource_node SET parent_id = :fallbackParentId WHERE parent_id = :userParentId',
+            [
+                'fallbackParentId' => $fallbackUser->getResourceNode()?->getId(),
+                'userParentId' => $userToDelete->getResourceNode()->getId(),
+            ]
+        );
+
+        // Relations to update or delete
+        $relations = $this->getRelations();
 
         foreach ($relations as $relation) {
-            $entityClass = 'Chamilo\\'.$relation['bundle'].'\Entity\\'.$relation['entity'];
-            $repository = $em->getRepository($entityClass);
-            $records = $repository->findBy([$relation['field'] => $userToDelete]);
-
-            foreach ($records as $record) {
-                $setter = 'set'.ucfirst($relation['field']);
-                if ('delete' === $relation['action']) {
-                    $em->remove($record);
-                } elseif (method_exists($record, $setter)) {
-                    $valueToSet = 'object' === $relation['type'] ? $fallbackUser : $fallbackUser->getId();
-                    $record->{$setter}($valueToSet);
-                    if (method_exists($record, 'getResourceFiles')) {
-                        foreach ($record->getResourceFiles() as $resourceFile) {
-                            if (!$em->contains($resourceFile)) {
-                                $em->persist($resourceFile);
-                            }
-                        }
-                    }
-                    $em->persist($record);
-                }
+            $table = $relation['table'];
+            $field = $relation['field'];
+            $action = $relation['action'];
+
+            if ($action === 'delete') {
+                $connection->executeStatement(
+                    "DELETE FROM $table WHERE $field = :userId",
+                    ['userId' => $userToDelete->getId()]
+                );
+            } elseif ($action === 'update') {
+                $connection->executeStatement(
+                    "UPDATE $table SET $field = :fallbackUserId WHERE $field = :userId",
+                    [
+                        'fallbackUserId' => $fallbackUser->getId(),
+                        'userId' => $userToDelete->getId(),
+                    ]
+                );
             }
         }
+    }
 
-        $em->flush();
+    /**
+     * Retrieves a list of database table relations and their corresponding actions
+     * to handle user resource reassignment or deletion.
+     */
+    protected function getRelations(): array
+    {
+        return [
+            ['table' => 'access_url_rel_user', 'field' => 'user_id', 'action' => 'delete'],
+            ['table' => 'admin', 'field' => 'user_id', 'action' => 'delete'],
+            ['table' => 'attempt_feedback', 'field' => 'user_id', 'action' => 'update'],
+            ['table' => 'chat', 'field' => 'to_user', 'action' => 'update'],
+            ['table' => 'chat_video', 'field' => 'to_user', 'action' => 'update'],
+            ['table' => 'course_rel_user', 'field' => 'user_id', 'action' => 'delete'],
+            ['table' => 'course_rel_user_catalogue', 'field' => 'user_id', 'action' => 'delete'],
+            ['table' => 'course_request', 'field' => 'user_id', 'action' => 'update'],
+            ['table' => 'c_attendance_result', 'field' => 'user_id', 'action' => 'delete'],
+            ['table' => 'c_attendance_result_comment', 'field' => 'user_id', 'action' => 'update'],
+            ['table' => 'c_attendance_sheet', 'field' => 'user_id', 'action' => 'delete'],
+            ['table' => 'c_attendance_sheet_log', 'field' => 'lastedit_user_id', 'action' => 'delete'],
+            ['table' => 'c_chat_connected', 'field' => 'user_id', 'action' => 'delete'],
+            ['table' => 'c_dropbox_category', 'field' => 'user_id', 'action' => 'update'],
+            ['table' => 'c_dropbox_feedback', 'field' => 'author_user_id', 'action' => 'update'],
+            ['table' => 'c_dropbox_person', 'field' => 'user_id', 'action' => 'update'],
+            ['table' => 'c_dropbox_post', 'field' => 'dest_user_id', 'action' => 'update'],
+            ['table' => 'c_forum_mailcue', 'field' => 'user_id', 'action' => 'delete'],
+            ['table' => 'c_forum_notification', 'field' => 'user_id', 'action' => 'delete'],
+            ['table' => 'c_forum_post', 'field' => 'poster_id', 'action' => 'update'],
+            ['table' => 'c_forum_thread', 'field' => 'thread_poster_id', 'action' => 'update'],
+            ['table' => 'c_forum_thread_qualify', 'field' => 'user_id', 'action' => 'update'],
+            ['table' => 'c_forum_thread_qualify_log', 'field' => 'user_id', 'action' => 'update'],
+            ['table' => 'c_group_rel_tutor', 'field' => 'user_id', 'action' => 'update'],
+            ['table' => 'c_group_rel_user', 'field' => 'user_id', 'action' => 'update'],
+            ['table' => 'c_lp_category_rel_user', 'field' => 'user_id', 'action' => 'delete'],
+            ['table' => 'c_lp_rel_user', 'field' => 'user_id', 'action' => 'delete'],
+            ['table' => 'c_lp_view', 'field' => 'user_id', 'action' => 'delete'],
+            ['table' => 'c_student_publication_comment', 'field' => 'user_id', 'action' => 'delete'],
+            ['table' => 'c_student_publication_rel_user', 'field' => 'user_id', 'action' => 'delete'],
+            ['table' => 'c_survey_invitation', 'field' => 'user_id', 'action' => 'update'],
+            ['table' => 'c_wiki', 'field' => 'user_id', 'action' => 'update'],
+            ['table' => 'c_wiki_mailcue', 'field' => 'user_id', 'action' => 'delete'],
+            ['table' => 'extra_field_saved_search', 'field' => 'user_id', 'action' => 'delete'],
+            ['table' => 'gradebook_category', 'field' => 'user_id', 'action' => 'update'],
+            ['table' => 'gradebook_certificate', 'field' => 'user_id', 'action' => 'delete'],
+            ['table' => 'gradebook_comment', 'field' => 'user_id', 'action' => 'update'],
+            ['table' => 'gradebook_linkeval_log', 'field' => 'user_id_log', 'action' => 'delete'],
+            ['table' => 'gradebook_result', 'field' => 'user_id', 'action' => 'delete'],
+            ['table' => 'gradebook_result_log', 'field' => 'user_id', 'action' => 'delete'],
+            ['table' => 'gradebook_score_log', 'field' => 'user_id', 'action' => 'delete'],
+            ['table' => 'message', 'field' => 'user_sender_id', 'action' => 'update'],
+            ['table' => 'message_rel_user', 'field' => 'user_id', 'action' => 'delete'],
+            ['table' => 'message_tag', 'field' => 'user_id', 'action' => 'delete'],
+            ['table' => 'notification', 'field' => 'dest_user_id', 'action' => 'delete'],
+            ['table' => 'page_category', 'field' => 'creator_id', 'action' => 'update'],
+            ['table' => 'portfolio', 'field' => 'user_id', 'action' => 'update'],
+            ['table' => 'portfolio_category', 'field' => 'user_id', 'action' => 'update'],
+            ['table' => 'portfolio_comment', 'field' => 'author_id', 'action' => 'update'],
+            ['table' => 'resource_comment', 'field' => 'author_id', 'action' => 'update'],
+            ['table' => 'sequence_value', 'field' => 'user_id', 'action' => 'update'],
+            ['table' => 'session_rel_course_rel_user', 'field' => 'user_id', 'action' => 'delete'],
+            ['table' => 'session_rel_user', 'field' => 'user_id', 'action' => 'delete'],
+            ['table' => 'skill_rel_item_rel_user', 'field' => 'user_id', 'action' => 'delete'],
+            ['table' => 'skill_rel_user', 'field' => 'user_id', 'action' => 'delete'],
+            ['table' => 'skill_rel_user_comment', 'field' => 'feedback_giver_id', 'action' => 'delete'],
+            ['table' => 'social_post', 'field' => 'sender_id', 'action' => 'update'],
+            ['table' => 'social_post', 'field' => 'user_receiver_id', 'action' => 'update'],
+            ['table' => 'social_post_attachments', 'field' => 'sys_insert_user_id', 'action' => 'update'],
+            ['table' => 'social_post_attachments', 'field' => 'sys_lastedit_user_id', 'action' => 'update'],
+            ['table' => 'social_post_feedback', 'field' => 'user_id', 'action' => 'update'],
+            ['table' => 'templates', 'field' => 'user_id', 'action' => 'update'],
+            ['table' => 'ticket_assigned_log', 'field' => 'user_id', 'action' => 'update'],
+            ['table' => 'ticket_assigned_log', 'field' => 'sys_insert_user_id', 'action' => 'update'],
+            ['table' => 'ticket_category', 'field' => 'sys_insert_user_id', 'action' => 'update'],
+            ['table' => 'ticket_category', 'field' => 'sys_lastedit_user_id', 'action' => 'update'],
+            ['table' => 'ticket_category_rel_user', 'field' => 'user_id', 'action' => 'delete'],
+            ['table' => 'ticket_message', 'field' => 'sys_insert_user_id', 'action' => 'update'],
+            ['table' => 'ticket_message', 'field' => 'sys_lastedit_user_id', 'action' => 'update'],
+            ['table' => 'ticket_message_attachments', 'field' => 'sys_insert_user_id', 'action' => 'update'],
+            ['table' => 'ticket_message_attachments', 'field' => 'sys_lastedit_user_id', 'action' => 'update'],
+            ['table' => 'ticket_priority', 'field' => 'sys_insert_user_id', 'action' => 'update'],
+            ['table' => 'ticket_priority', 'field' => 'sys_lastedit_user_id', 'action' => 'update'],
+            ['table' => 'ticket_project', 'field' => 'sys_insert_user_id', 'action' => 'update'],
+            ['table' => 'ticket_project', 'field' => 'sys_lastedit_user_id', 'action' => 'update'],
+            ['table' => 'track_e_access', 'field' => 'access_user_id', 'action' => 'delete'],
+            ['table' => 'track_e_access_complete', 'field' => 'user_id', 'action' => 'delete'],
+            ['table' => 'track_e_attempt', 'field' => 'user_id', 'action' => 'delete'],
+            ['table' => 'track_e_course_access', 'field' => 'user_id', 'action' => 'delete'],
+            ['table' => 'track_e_default', 'field' => 'default_user_id', 'action' => 'update'],
+            ['table' => 'track_e_downloads', 'field' => 'down_user_id', 'action' => 'delete'],
+            ['table' => 'track_e_exercises', 'field' => 'exe_user_id', 'action' => 'delete'],
+            ['table' => 'track_e_exercise_confirmation', 'field' => 'user_id', 'action' => 'delete'],
+            ['table' => 'track_e_hotpotatoes', 'field' => 'exe_user_id', 'action' => 'delete'],
+            ['table' => 'track_e_hotspot', 'field' => 'hotspot_user_id', 'action' => 'delete'],
+            ['table' => 'track_e_lastaccess', 'field' => 'access_user_id', 'action' => 'delete'],
+            ['table' => 'track_e_links', 'field' => 'links_user_id', 'action' => 'delete'],
+            ['table' => 'track_e_login', 'field' => 'login_user_id', 'action' => 'delete'],
+            ['table' => 'track_e_online', 'field' => 'login_user_id', 'action' => 'delete'],
+            ['table' => 'track_e_uploads', 'field' => 'upload_user_id', 'action' => 'delete'],
+            ['table' => 'usergroup_rel_user', 'field' => 'user_id', 'action' => 'update'],
+            ['table' => 'user_rel_tag', 'field' => 'user_id', 'action' => 'delete'],
+            ['table' => 'user_rel_user', 'field' => 'user_id', 'action' => 'delete'],
+        ];
     }
 
     public function getFallbackUser(): ?User
diff --git a/src/CourseBundle/Entity/CLpCategoryRelUser.php b/src/CourseBundle/Entity/CLpCategoryRelUser.php
index de65336ac83..3de11033bdd 100644
--- a/src/CourseBundle/Entity/CLpCategoryRelUser.php
+++ b/src/CourseBundle/Entity/CLpCategoryRelUser.php
@@ -30,8 +30,8 @@ class CLpCategoryRelUser implements Stringable
     protected CLpCategory $category;
 
     #[ORM\ManyToOne(targetEntity: User::class)]
-    #[ORM\JoinColumn(name: 'user_id', referencedColumnName: 'id', onDelete: 'SET NULL')]
-    protected User $user;
+    #[ORM\JoinColumn(name: 'user_id', referencedColumnName: 'id', nullable: true, onDelete: 'SET NULL')]
+    protected ?User $user = null;
 
     public function __toString(): string
     {