Then perhaps Plex has deducted the disc number from the folder name, if it was missing from the meta tags.
That folder is named as if you are dealing with a box set.
Plex doesn’t know about box sets. It can only handle multi-disc albums.
And apparently it interpreted this one here as just a nother disc belonging to an album that it had already in its database.
If you don’t want plex to do that, ensure that
- the new album version has a different content in its Album Title metatag
- has the right disc number tagged
- is stored inside a different “album” folder than all other versions and albums
- all your music should follow this folder structure: https://support.plex.tv/articles/200265296-adding-music-media-from-folders/
The folder structure you’re showing above is missing theArtistfolder level. I assume in this case it should be:\NAS1\Music\Grateful Dead\1977 - Disc 09 - Terrapin Station\
And avoid using WAV files. Plex cannot read meta tags from these.
If Plex is keeping on adding your new version to an existing album, go find the correct releases on Musicbrainz.org of all versions. (If there actually are different releases listed. If they’re missing, you might have to add them there.)
Then perform the Plex Dance with the affected albums, and add them back one-by-one.
Then use Musicbrainz Picard to tag the Musicbrainz release ID directly into your files.
