Jellyfin automatically inserting metadata

[TheMines]

I've been trying to correctly upload a show titled "ONE" to my Jellyfin server, which Jellyfin continued autofilling the incorrect show (even when inserting an IDMb ID), to then which I decided to manually enter it. Though, every time I upload it and enter the correct metadata manually, Jellyfin undoes all my changes and inserts the same, incorrect metadata. I haven't been able to solve the issue for hours.
Could anyone please help?