Should I "upgrade" my libraries?

That’s about right. Until you refresh the metadata, the conversion is not complete.
Which then leads to unexpected behaviour when you add a “quality upgrade” to an item or move the media files from one library folder to another one.
Because this will then lead to the situation that the newly added files will get a guid from the new agent, while the old items still have an old guid.
Which means to Plex: These are different media.

1 Like