There are at least 6 different movies by that name in existence.
You gotta help Plex to determine which it is by adding the release year in parentheses after the title.
https://support.plex.tv/articles/200381023-naming-movie-files/
After changing the file name, perform the full Plex Dance
see also https://support.plex.tv/articles/201543057-why-is-some-of-my-content-not-found/
