don't treat user_id as array, remove duplicate check, fixes #1743

assigned to @elmar

approved this merge request

added 2 commits

• d08d1b67 - 1 commit from branch main
• 85a0df4e - don't treat user_id as array, remove duplicate check, fixes #1743 (closed)

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mentioned in commit d48f57dc

mentioned in commit 49f733b9

mentioned in commit 3fa82c14

mentioned in commit 625e77bf

mentioned in commit hochschule-wismar/stud-ip@96a513a5