Custom Entered Tags Disapeared/Missing

I have a library with custom metatags that I inputted. Recently a large section of one particular subfolder lost all it’s metatags. I’d previously disabled all auto metatag matching and promoted my personal settings. I didn’t update anything on my computer and as far as I know nothing else has changed. Is there a back-up of my inputted metatags saved somewhere? I’ve spent several hours tagging these and would be pretty upset if they are gone, and I’m concern that this is something that could potentially happen again. What would have caused this? How can I get my tags back? How can I trust that this won’t happen again?

You can try to revert back to a plex database file from a few days ago:
https://support.plex.tv/hc/en-us/articles/202485658-Restore-a-Database-Backed-Up-via-Scheduled-Tasks-

Rule #1 for custom tags:
If you have media which are not getting a ‘match’ via the Plex online metadata sources
(for instance because what you have are not movies or regular tv shows but your own custom videos)
you need to make sure that these items are not ‘unmatched’ but are classified as ‘Personal Media’.
Otherwise Plex will atempt to match them to stuff against its online metadata sources.

The best approach would be to create a separate library and set the default metadata source for this library to ‘Personal Media’.
But if you have custom media together with normal movies in one library, you want to perform a ‘Fix Match’ and pick the ‘Personal Media’ agent while doing so.

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Worked like a charm! Thank you, you rock!. I do have the metasource set for the library to ‘Personal media’ already. Would there be any other settings I should check to see might explain why those tags disappeared? Great appreciate the help and insight.

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