Tests

Fix postgres unique constraint exception #20866

Job	Run time
Checkstyle	2m 1s
CHANGELOG.md - only unreleased touched	19s
CHANGELOG.md	8s
Code coverage	30s
Database tests	2m 38s
GUI tests	1m 56s
Markdown	6s
Modernizer	1m 13s
OpenRewrite	2m 2s
Unit tests	3m 58s
Validate Gradle Wrapper	5s
Find merge conflicts	4s
Source branch is other than "main"	1s
Validate requirement coverage	32s
upload-pr-number	4s
	15m 37s

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