The Wonderfully Weird World of Gumball Season 1 - Trakt and The Amazing World of Gumball Season 7 - Trakt are the same exact thing. I think it’d be best to remove the season 7 listing, so users aren’t needlessly confused on which version to track.
Currently, both entries are listed on our datasource, TMDB, and they are deciding if it should be a new season or a new show, as you can see in this discussion: Reported Problem for The Amazing World of Gumball: Season 7 - Discuss The Amazing World of Gumball — The Movie Database (TMDB)
For now, I’ll keep both here and once TMDB decides what listing they are keeping I’ll merge the data on our end, so you can mark the episodes as watched in any of the pages.