Season 1 will work.
I use Season 01 because that’s what Filebot does - and it’s what’s in the instructions.
To do this right:
1)Remove The Tunnel from the Library to a place of safe keeping where Plex can’t see it.
2) Fix the file names and structures outside of Plex’s View.
3) scan library
4) see show is gone - completely.
5) empty trash
6) clean bundles
7) put ‘Fixed’ TV Show back into TV Show Library
8) scan library
That is called The Plex Dance and if you hate doing that - join the club - but also know how important it is to use valid TV Show naming and structuring so you can AVOID the Plex Dance - if possible.