If you try to change direction on the translated version rel in http://ngs.musicbrainz.org/work/dcc680e6-f2f3-4325-b4c0-dbcde9f39e05
You will get "A relationship between Jag går på promenaden and Walking on Sunset already exists with these attributes."
This makes it necessary to remove and re-add rels... can be done so it is not as huge as some other bugs, but still important!