Duplicates that are not Duplicates

Question: Where does the library point for the series? To E:\? To E:\MASH?

If E:\, what else is in the directory? Hopefully no movies.

The usual structure would be E:\TV Shows\MASH\....., with the library pointing at TV Shows.

Basically, you cannot mix TV shows and movies in the same library. Also, the library must be the correct type, in this case, TV Show.

Suggestion: You should be able to split the shows. Using Plex Web, from the pre-play page click on the three dots, then choose “Split Apart.” I doubt this will work long term. Plex will probably re-combine them at some point when it re-scans the library.

Suggestion: Do a bit of cleanup on your directory names. For season 10, you put the year in the episode name. However, neither the show directory or other episode names contain the year. Either use the year or don’t. Plex likes consistency.

\MASH (1972)\Season 01\MASH (1972) - s01e01.mp4
or
\MASH\Season 01\MASH - s01e01.mp4

Suggestion: Verify and cleanup any embedded metadata in the files.

Examine the files with MediaInfo or look at the Plex XML info (click on View XML).

Make sure the show name, season, episode, etc are correct if present in the file.

If the show name is present, make sure it is M*A*S*H, not MASH.

Windows: MP3TAG
Mac: Subler

Suggestion: If none of the above works, change the search agent for the library from TheTVDB to The Movie Database. To change, edit the library, choose Advanced, then change the agent.

Reason: M*A*S*H might throw Plex for a curve. You cannot have * in a file or directory name, so you have to leave it out. However, if you search TheTVDB for 'MASH" it does not find the show. You have to search for M*A*S*H. On The Movie Database, you can search for ‘MASH’ and receive the correct information.

That’s everything I can think of right now. I suppose you could fall back to a prior version. If you want to do that, see this post.