It seems like the upgrade script does not delete settings and settinggroups that aren't used anymore. It just adds the new ones.
Yes, I don't believe the upgrade script has code to delete old settings and settinggroups.
Ah, ok. I manually deleted them from the database.
DELETE FROM mybb_settinggroups WHERE name = 'banning';
DELETE FROM mybb_settings WHERE name IN ('bannedusernames','bannedips','bannedemails','cssmedium','publiceventcolor','privateeventcolor');
Wouldn't it be better if the upgrader would delete the old data?
Thank you for your bug report.
This bug has been fixed in our internal code repository. Please note that the problem will not be fixed here until these forums are updated.