Check they’re in separate folders, search for each on TVdb, and append the TVdb series ID onto the folder name in the file system.
So for example, change the One Piece (2023) folder name to “One Piece (2023) [tvdbid-392276]”
Jellyfin can use this information to help correctly pull the information you’re looking for.
More info here: https://jellyfin.org/docs/general/server/media/shows/