Year range The Perils of Penelope Pitstop

Currently, The Perils of Penelope Pitstop has a year range of 1969-1971: https://www.imdb.com/title/tt0173587/reference/ 

However, as you can see, all episodes on IMDb are from 1969-1970. 

TV Maze also says this series ran from 1969-1970: https://www.tvmaze.com/shows/19419/the-perils-of-penelope-pitstop 

So does TMDB: https://www.themoviedb.org/tv/1765-the-perils-of-penelope-pitstop/season/1/episode/17 

Can a staffer look into this and fix the year range please?