How come?
This is shown any time the album matches an edition on TIDAL.
The trouble is, if you already have the Tidal album in your library, it still comes up with ‘other versions’ which links to the same version on tidal - see example below
This is by design. The version in your library could have edits or favorites, could be incomplete (like if you only added a single track to your library) and will also reflect library-specific links, like if you have other performances of a particular song, or if a given composer features prominently in your library.
This link takes you to the “untouched” version of the album on TIDAL, as distinct from the one in your library. It’s a bit of a weird concept when none of the distinctions I mentioned above apply, but for consistency we need to give you that link.