From what I’ve been told, Trakt introduced a requirement for IMDB or TVDB ID on the TMDB entry. They say this is to prevent duplicates but there are more missing so it’s not worth it.
The problem is TMDB and their nonsense rules. Well for American Idol, everywhere treats it as a single show that was on hiatus so current season is 24 (single show). TMDB has it split into 2 separate shows and does not allow duplicate IDs (can’t have ID for same show when they split it). Well IMDB and TVDB only have a single ID and TMDB says ABC has it as season 9 so they can’t do anything.
If Trakt didn’t have the requirement, then things would work. That’s why the following was created.