Some of the Trakt API servers are returning for TV show Percy Jackson and the Olympians traktid=194518 a series record that states the show has 3 seasons, but when you go to fetch the third season record the API returns 404 not found.
Yet, other API servers are returning this show with the correct amount of seasons (there are just two).
I think this is related to the fact that season 3 was removed yesterday on Trakt (because it was also removed from TMDB)and not all places are updated because the change is recent.