Unable to find how to remove a release group

I cannot find how to remove a release group.

This is the release group link below.

Since the group has a different name I’m unable to merge it with the 1981 release group



If it’s the same as another release group, you can still merge it into the correct one. Name doesn’t matter if it’s correct. Need to remove all relationships (i.e. links) for it to remove itself eventually. But I’d just merge it into the 1981 release group.