I think i messed something a bit up and made some errors here.
Unheard Music Series releases reissues of free jazz recordings. (https://en.wikipedia.org/wiki/Unheard_Music_Series)
so i wanted to add https://musicbrainz.org/release/929bf443-88f6-421c-bbe6-0c1a2c275035 to the already existing series and had to find out, that it is a release group series, which is of course wrong for the Unheard Music Series. There was no way to correct the Series (https://musicbrainz.org/series/c282e5ef-56b2-4f74-bd67-574ac7ccab5e), probably because 2 releases are already linked? So i created a new version (my mistake) (https://musicbrainz.org/series/908220f2-6e31-43af-bbbe-41b358b339ad) in hope to merge the two sets.
However, i could not add UMS to the “Unlawful Noise” CD release. Instead I got the error message:
Incorrect entity type for part of series relationship at lib/MusicBrainz/Server/Data/Relationship.pm line 613, <$fh> line 1.
so in trying out, to see if it works, i added the release series (https://musicbrainz.org/series/908220f2-6e31-43af-bbbe-41b358b339ad) to release group series and it got entered.
now also the 1976 vinyl is associated with the UMS, which is of course, wrong.
I could now make another edit to the queue to remove again the release group series. But first, i wanted to know how to deal with this and indicate on MB, that the cd reissue is part of the UMS. Also, i think a merge of the two release groups would be useful.