I have a few situations whereby a movie is incorrectly associated with another movie. Below are some screenshots of the movie ‘Hustlers’. You will see there’s an icon denoting it’s associated with another movie, ‘The Hustle’; two completely different movies. Although they are not a ‘Collection’, they do appear in XML together.
Is it possible to edit this XML file? I could not find a way, if it actually exists.
You can split the movies apart (see Split Apart Items at this link):
You may also want to clean up your filenames a bit. Place everything after the year in square brackets. For example:
Hustlers (2019) [1080p AC3].mkv
The stuff in the square brackets will then be ignored. You may have to re-scan and potentially do a Fix Match. Worst case, you may need to perform the Plex Dance after renaming.