Tried adding this show onto tmdb since its only on tvdb. Probably did something wrong. When i check the comparison page its blank for tmdb. Just curious whats the correct way to do things or how it should work? For future reference as well. Thanks
Trakt
TMDB
EDIT: i tried importing the show again and it created a new trakt entry. I suspect because i added a season 1 and new premiere when there wasnt one before. So yah now what?
Heres the
New trakt entry
You have to add the tvdb id to tmdb and wait a while for it to sync.
If you imported the tmdb id to trakt too you’ve successfully created a duplicate entry 
Report it through the trakt website as a dupe and link the original trakt page so support can merge them.
what i would do is go to the trakt entry that you wanted tvdb added. and click on report and ask trakt support to add tvdb to this trakt entry.
first be sure to add the tvdb_id to the tmdb entry like the prevous user mentioned.
also them them about the new trakt entry that was created from tmdb which they will need to merge into the original trakt entry. When an trakt entry has already been created, creating a new entry in tmdb will create a new trakt entry. so if there’s a trakt entry already, dont import it in. i would always report it so it an be imported manually.
To link a page that only has it’s TVDB ID on Trakt to TMDB all you need to do is go to TMDB and add the TVDB ID to the external IDs section:
After you do that, just wait a few hours and refresh the TVDB page on Trakt. That will get the comparison updated with the TMDB ID. (You can report the page and we can refresh it if needed).
You can also report that page and inform the TMDB ID and I’ll manually add it and refresh the page.
Since you imported the TMDB page, that created a duplicate, so I’ll merge them.
