The problematic edit:
http://musicbrainz.org/edit/14890478

ModBod rejected the edit with this status:
Failed dependency
This edit failed either because an entity it was modifying no longer exists, or the entity can not be modified in this manner anymore.

ModBot note:
An artist that is used in the new artist credits has been deleted

In fact the artist Handel does not exist anymore. It has been probably merged by this edit:
http://musicbrainz.org/edit/14823063

but in the rejected edit I changed only track titles not artists or artist credits so it should have not been rejected.