If your files are ‘Unmatched’ - or loaded with bogus Metadata - locking those fields does nothing.
When Plex scans and finds ‘Unmatched’ or is preferring Bogus Metadata that ‘Unmatches’ your show - you’re done.
Do the LMA Hack across the board - Shows and Movies - ALL Tabs.
Make sure your file names and structures are ‘Pristine’:
https://support.plex.tv/articles/naming-and-organizing-your-tv-show-files/
TV Shows are the most dependent on proper names and structures.
Once you get all that right - Plex Dance:
ALL Steps - In Order - or it won’t work.
