Joris@nlwiki can't login after being renamed from Joris1919 earlier today. When trying to do so MediaWiki returns the MySQL's error "1062: Duplicate entry 'Joris1919' for key 2 (10.0.6.23)" which was called from User::saveSettings. According to the renaming log his account has indeed been renamed. His old edits do appear under his new user name.

Version: unspecified
Severity: major