I was informed here that one can manually identify a movie/show from within Jellyfin by clicking on the "Identify" button. This works great for the top-level titles of movies, and shows, but I can't figure out how to do it for the individual seasons from within shows.
I have a show that Jellyfin is able to identify all but one of its seasons. I went to manually identify it in the usual fashion by clicking on the three dots, but I had no option to identify, as seen here:
I'm aware that I can manually enter in all of the metadata, but I would rather not do that if I don't have to; I would much prefer it if I could identify it, and have the metadata be pulled in automatically.
Edit 1: I have opened a bug report for this here (if this is a bug), and a feature request here (if this is not a bug).
You can't identify only one specific season. The identify button is visible only on the show level not season level.
So you can click on the show name, and try to identift it by a different result as there might be multiple matching metadata sources, one might have only 2 seasons and another one might have more.
If that doesn't help you could try to add some ini files on episodes, or maybe check if the whole issue is not with them as they override the session number.
Other than that you are probably left with updating metadata yourself.