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.
This might be a duplicate of
MBS-3017, but since there's no obvious reason why that one failed, I can't be sure.