This is a maddening bug with Plex - that it isn’t more proactive about updating previously-known entries, even after they are completely removed from that library.
First off: I assume you’ve separated the paths for each Movies library, specific to their path in your file system - one pointing to Media/Movies/SD Movies, one to Media/Movies/HD Movies, and one to Media/Movies/UHD Movies (effectively correct?)
To get Plex to kill off the now-obsolete entries in your (existing) “Movies” library, and allow you to focus on them only in your (new) “UHD Movies” library, you’ll need to do The Plex Dance™.
Some details here - but in effect:
- Remove TV Show/Movie from Library folder
Move to temporary folder, or similar; somewhere outside of known hierarchy, where it can’t be “seen” by Plex - {specific Library} -> Scan Library files
- {server} -> {manage server} -> Empty trash
- {server} -> {manage server} -> Clean bundles
For more details on the Scan library files, Empty trash, and Clean bundles actions, see: https://support.plex.tv/hc/en-us/articles/200392106-Library-Actions - Bring names and structure of local media assets into compliance
Focus on desired Name, Show Title, Season, etc. - and ensure you are adhering to the expected nomenclature for Movies and TV Shows - Replace the corrected TV Show/Movie back into your Library folder
In other words, move your entries back into the expected hierarchy location - {specific Library} -> Scan Library files … once again
All Steps. In Order. No Shortcuts.
NOTE: The following data is lost when you do the Plex Dance (not comprehensive; there may be more…)
- Any custom edits you’ve made to an item (tags, ratings, labels, etc.) is lost
- Any tracks you’ve added to a Playlist will be removed from the Playlist
- Play history is lost
- ‘Date Added’ is changed (to the newly-scanned date; i.e. “just now”)
