Underscores can cause problems. Use nothing, a dash, or periods instead
I Puffi (2021)\Season 01\I Puffi S01E01 Questione di naso.mp4
I Puffi (1981)\Season 01\S01E01.mp4
s1e1 ← Not supported
I would take both shows out and add the tvdb id.
Plex dance ← click
I Puffi (2021) {tvdb-392426} ← Show folder
I Puffi (1981) {tvdb-75719}
You can split the shows but if you have to rebuild your library or server, whatever is causing this will happen again if you don’t fix the root problem
