Album originally released under one name, later re-released under a variant name.
Add re-release, credited to new name variant
Go to release group page, choose "add release".
Enter release artist credit.
Use tracklist from existing release.
Note that all tracks are credited to the "main" artist name.
Make "Change track artists" in the release editor into "Set track artists" for the add-release editor. Show it on the first page.