https://musicbrainz.org/work/75ae0f5f-715b-4fbb-a26a-eefa9f5c218f has both parts of and parts relationship to the same work, I assume this is invalid.
If so would be useful to prevent it happening in the first place.
Indeed, loops should be forbidden for most of relationship types!Such issue has to be filed at http://tickets.musicbrainz.org
Hmm, doesnt seem possible to delete the relationship
Raised issue http://tickets.musicbrainz.org/browse/MBS-9016
As of a few seconds ago Reosarevok has put in a request to remove one, and 3 people have voted yes for that removal and none have voted no. The expiry time is listed as 6 days