The issue is reproducible only in the legacy BO.
Steps to reproduce:
- Install eZ Platform with LegacyBridge
- Go to the legacy BO
- Go to the User Accounts tab, select any group and create the new user within
- In the User create view, don't fill all fields and click on "Store draft and exit"
- Go to the User Accounts tab again and try to create the new User within whichever group.
You will be notified of the exception:
The issue is caused by UNIQUE INDEX on login column in ezuser table introduced by: https://github.com/ezsystems/ezpublish-kernel/commit/bd257edd13760869891144d0d58d86828280eca1