Thread:Project:Support desk/User account is not registered

I am having some issues with a particular user. This user happens to be userid=1 in the database. The user's name is Dk_barons. When he tries to register he gets an error stating that username is not registered. If I manually change the username to Dkbarons in the database, he can login. But that is obviously not a solution. I am not aware of any other users having problems logging in.

I can find the username in the Special:ListUsers and he shows up on revision lists for edits he has made. Going to User:Dk_barons results in User account Dk_barons is not registered.

This wiki used to run ipbwiki bridge extension. The extension has been commented out in LocalSettings.php; however, ipbwiki tables remain in the database because I have not read of a good way to uninstall the ipbwiki extension, which heavily modified the database tables. Mediawiki current version: 1.23.3 (recently updated from 1.16).