diff --git a/server/gc/seaf-fsck.c b/server/gc/seaf-fsck.c
index 3595208f..171628f6 100644
--- a/server/gc/seaf-fsck.c
+++ b/server/gc/seaf-fsck.c
@@ -151,7 +151,7 @@ main(int argc, char *argv[])
 
 #ifdef __linux__
     uid_t current_user, seafile_user;
-    if (!force && !check_user (seafile_dir, &current_user, &seafile_user)) {
+    if (!export_path && !force && !check_user (seafile_dir, &current_user, &seafile_user)) {
         seaf_message ("Current user (%u) is not the user for running "
                       "seafile server (%u). Unable to run fsck.\n",
                       current_user, seafile_user);
diff --git a/server/repo-op.c b/server/repo-op.c
index f933f596..5f1916f6 100644
--- a/server/repo-op.c
+++ b/server/repo-op.c
@@ -1024,17 +1024,20 @@ check_files_with_same_name (SeafRepo *repo, const char *parent_dir, GList *filen
     char *canon_path = NULL;
     SeafCommit *commit = NULL;
     SeafDir *dir = NULL;
-    GError *error = NULL;
     gboolean ret = FALSE;
 
-    GET_COMMIT_OR_FAIL(commit, repo->id, repo->version, repo->head->commit_id);
+    commit = seaf_commit_manager_get_commit(seaf->commit_mgr, repo->id, repo->version, repo->head->commit_id);
+    if (!commit) {
+        seaf_warning ("commit %s:%s doesn't exist.\n", repo->id, repo->head->commit_id);
+        goto out;
+    }
 
     canon_path = get_canonical_path (parent_dir);
 
     dir = seaf_fs_manager_get_seafdir_by_path (seaf->fs_mgr,
                                                repo->store_id, repo->version,
                                                commit->root_id,
-                                               canon_path, &error);
+                                               canon_path, NULL);
     if (!dir) {
         goto out;
     }
@@ -1051,7 +1054,6 @@ check_files_with_same_name (SeafRepo *repo, const char *parent_dir, GList *filen
         g_free (unique_name);
     }
 out:
-    g_clear_error (&error);
     g_free (canon_path);
     seaf_dir_free (dir);
     seaf_commit_unref (commit);
@@ -6531,7 +6533,7 @@ hash_to_list (gpointer key, gpointer value, gpointer user_data)
 }
 
 static gint
-compare_commit_by_time (gconstpointer a, gconstpointer b, gpointer unused)
+compare_commit_by_time_ex (gconstpointer a, gconstpointer b)
 {
     const SeafCommit *commit_a = a;
     const SeafCommit *commit_b = b;
@@ -6540,6 +6542,12 @@ compare_commit_by_time (gconstpointer a, gconstpointer b, gpointer unused)
     return (commit_b->ctime - commit_a->ctime);
 }
 
+static gint
+compare_commit_by_time (gconstpointer a, gconstpointer b, gpointer unused)
+{
+    return compare_commit_by_time_ex(a, b);
+}
+
 static int
 insert_parent_commit (GList **list, GHashTable *hash,
                       const char *repo_id, int version,
@@ -6597,7 +6605,7 @@ scan_stat_to_list(const char *scan_stat, GHashTable *commit_hash, SeafRepo *repo
         }
     }
     json_decref (commit_array);
-    list = g_list_sort (list, compare_commit_by_time);
+    list = g_list_sort (list, compare_commit_by_time_ex);
     return list;
 }