How to force Series to use folders as seasons

[Stylish Suidae]

I've got JoJo's Bizarre Adventure on my server, and I'd prefer that it be split up by story arc rather than by season (the first season has two arcs, and the third arc is split up across two seasons). I've got everything in the proper folders, but when I go into a "season" in Jellyfin, it's also adding stuff from other folders  because it's in that number season, so the "season" for the first arc also has all of the episodes of the second arc because, on any source of metadata you can find, season one contains both arcs. And then my folder for the second arc also has the first half of the third, because that's what the metadata says is in season 2.

Is there a way for me to tell Jellyfin "ignore what you find on the metadata sites, only group these by what folder I have them in"?