Plex DVR lost episode after I messed with it

Ok. It’s getting worse. Since my first post, I have renumbered a few of the episodes that were named incorrectly when recorded, and now the entire first season has disappeared. It does not scan. The folder shows up in folder view and plays. But I notice there are some other folders named “Season 01”, “Season 02”, and “Season 05” With seemingly random other shows in it. These folders do not exist outside of plex.

I’ve done the plex dance. It appears that the permissions and ownership match the folders that work. But doesn’t scan.

Can I just tell it to rebuild the database from scratch? What will I lose?

Thanks,
Mike