Year range The Pirates of Dark Water

Currently, the year range for The Pirates of Dark Water (https://www.imdb.com/title/tt0101169/reference/) is listed as 1991-1992. 

However, the episodes on IMDb are from the period 1991-1993. 

epguides.com also says this series ran from 1991-1993: https://epguides.com/PiratesofDarkWater/ 

So does this site: https://www.dvdtalk.com/reviews/46216/pirates-of-dark-water-the-complete-series-the/ 

Can a staffer correct this please?