When adding an alias to http://test.musicbrainz.org/work/8c7e3eee-2581-3553-92e7-4caabbfb480a/add-alias I got:

Caught exception in MusicBrainz::Server::Controller::Work->add_alias "The edit could not be created.
POST: $VAR1 =

{ 'edit-alias.edit_note' => '', 'edit-alias.as_auto_editor' => '1', 'edit-alias.locale' => 'en', 'edit-alias.name' => 'one two three' }

;

Exception:$VAR1 = 'Couldn\'t load class (MusicBrainz::Server::Edit::Artist::Merge) because: Cannot add an override method if a local method is already present at /usr/local/lib/perl/5.8.8/Moose.pm line 99