"Duplicate" TV Shows

From another thread: https://forums.plex.tv/discussion/158487/plex-incorrectly-identifying-tv-episodes/p1

@OttoKerner said:
Perhaps you renamed the files to a conforming name schema only after they were already (incorrectly) matched.

If this is the case, you still need to perform the ‘Plex Dance™’ to erase their checksums from the plex database.

[optional: disable the SubZero plugin if installed]

  1. move all files for the show out of ‘sight’ of plex
  2. update library (not ‘force update’ not ‘Refresh all’)
  3. empty trash
  4. clean bundles
  5. double check naming schema and move files back
  6. update library

[optional: re-enable the SubZero plugin if installed]

in this order