Why does Plex show me twice the same album?

[bonnyfused]

@trumpy81

Plex Dance (© OttoKerner):

1. Remove offending file/s from your Plex Media Folder. (Make sure Plex cannot see the file/s)
2. Scan Library Files (Not ‘Refresh All Metadata’)
3. Optimise Database
4. Clean Bundles (Skip this step for Music only)
5. Empty Trash
6. Replace the offending file/s into your Plex Media Folder.
7. Scan Library Files

The Plex Dance solved my issue. I was already sure that the tags were 100% OK, as I had just hours before passed the album through MusicBrainz Picard. So just following the 7 magic steps led to the solution!
Thanks!
F.