Maybe also check out this post from another use like last week. It’s currently super vague about what type of [database]id to import. Seems like for tvdb it has to be episode id. But people have tried series id.
Maybe that should be specified extra clearly. Also how does trakt now whether it’s a tmdb movie or episode id that would be imported (how does one find an episode id on tmdb even. Except looking at the source code lmao).
Or are both unique (perhaps?).
Same for IMDb. Although those ids are quite clear.
Duplicate id thingy is actually also mentioned in the announcement post from January by yet another user.