When I add a movie file to Plex, sometimes it gathers the wrong information and I have to change it manually. Anytime the year is wrong, I cannot change it. I can only delete the wrong year and leave it blank.
Recently, I uploaded Dark Waters from last year. I named the file Dark Waters (2019), and the one from 2003 populated. I’ve always named my movie files like this, and the wrong title has populated several times.