I recently migrated my movies from one NAS to another. I followed the move library instructions (copied to new location, allowed Plex to re-match, etc.).
Something must have been missed, because my Collections are showing 0 movies in them. OK, so I figured I’d manually update them.
I finally had a few minutes to start this today, but when I go into the respective movies to add to their collection - the tags are not listed.
If I select “Collections” under Movies, all of my collections are shown - with the proper art. But when going into individual movies, under the Collection tag, none of those are listed and I’m being asked to create them again.
If you “edit” one movie which is supposed to be in a collection, is there something in the Collections input field?
And even if it is empty, is is “locked”?
Did you actually transfer the Plex data folder from the old NAS? Or just the media files?
I think the transfer of the library coincided with an incomplete transition from the old Plex Movie (Legacy) agent to the new movie agent. Maybe the library had been already set to the new scanner and agent, but the subsequent Refresh of Metadata was never performed.
The result is now that all your collections are not populated anymore, because they still have references to the old Plex Movie (Legacy) agent guid's in them. But your movies now have different guid's, so technically they are all different movies now.
I’m afraid you will have to reconstruct your collections manually.
Is “Minimum automatic collection size” set to “Disabled”? Try setting it to 3.
Then pick a set of movies which are direct sequels/prequels of each other. “Select” them at once, then Refresh Metadata of them.
Do you get a second collection or is the old once repopulated?
(The Marvel colection cannot be populated automatically. Plex fetches this collection info from TheMovieDB. And they require that collections only contain direct sequels/prequels and no differently related items.)
Just the media files were moved - everything on the server stayed the same.
And boo - that’s no fun. There are only 48 collections to update though, fun project for a long weekend.
So the good news is, when I manually add this particular movie to it’s proper Collection, it does populate in the existing one. It does not create something new. So the net shouldn’t be as bad as I thought. It’s manual, sure… but I won’t have duplicate Collections.
If you only transferred the media files, I wonder where the collection info came from in the first place?
Are these all mp4 files and you have content in the Album meta tag of these movies?
If you only moved the media files over to the new server, there should be no collections at all on the new server.
Stuff like this is only stored in the Plex data folder. And if you didn’t move this folder to the new server, then there would be no way to transfer them between servers.
Ohhhhh… interesting. I didn’t realize that part. So even though my Plex media server didn’t change, only the media files - I still needed to move another directory?
Just to clarify - my Plex server stayed in the exact same location. My media files (movies) went from one Synology NAS to another Synology NAS with more space.
I’ve moved media locations in the past without an issue to my collections. This is why I was surprised this happened here.
Are you saying that your server is not running on the NAS?
Then you didn’t move your server at all, but you only changed the storage location of your media files.
In this case it becomes clearer what happened. The paragraph above about an incomplete transition from the old to the new movie agent applies.
