Year range Fantastic Max

Currently, Fantastic Max has a year range of 1988-1991: https://www.imdb.com/title/tt0190904/reference/ 

However, as you can see, all episodes on IMDb are from 1988-1990.

TVmaze also says this series ran from 1988-1990: https://www.tvmaze.com/shows/73794/fantastic-max 

So does Moviefone:: https://www.moviefone.com/tv-shows/fantastic-max/7OhNLgZ4LK8oirOvpyTJS4/ 

Can a staffer fix this please?