Converting to multiuser project after restoring a project backup sometimes fails due to duplicate client IDs in database.
Converting to multiuser project after restoring a project backup sometimes fails due to duplicate client IDs in database.
After going through the steps, select the affected Project, open the context menu and go to "multi-user" and active offline mode.
Right after that activate online mode again and the screens can be checked out again and are not locked anymore. This works everytime so there seems to be an issue with the Editor how it interprets the Workspace.
You can also readback the wsb, convert it into multi-user and Right after that, read the same Workspace back again -> the Projects are already converted as multi-user and are offline.
If you Change them into online-mode, the message "database locked" appears again, but now the Projects can be edited without any issues.