Year range Foofur

Currently, the year range for Foofur (https://www.imdb.com/title/tt0286359/reference/) is listed as 1986-1988.

However, as you can see, all episodes on IMDb are from 1986-1987. 

Epguides.com also says this series ran from 1986-1987: https://epguides.com/Foofur/ 

The same goes for TVmaze: https://www.tvmaze.com/shows/29707/foofur 

Can a staffer fix this please?