Thetvdb ID "394325" has already been taken.

that usually means the show had those ids added but was later deleted or the request got rejected. in this case it's the latter:
https://www.tvmaze.com/threads/2606/possible-to-add-shows-from-swearnet

@bungle wrote:
that usually means the show had those ids added but was later deleted or the request got rejected. in this case it's the latter:
https://www.tvmaze.com/threads/2606/possible-to-add-shows-from-swearnet

Thanks