Year range Janguru Bukku shônen Môguri

Currently, Janguru Bukku shônen Môguri (The Jungle Book) has a year range of 1989-2020, despite the fact that all episodes (https://www.imdb.com/title/tt0283750/episodes/?season=1) are from 1989-1990. Other sources also say it ran from 1989-1990 (for example: https://www.animenewsnetwork.com/encyclopedia/anime.php?id=1722). I'm unable to find out how/why 2020 ended up being listed as the end year though. Can a staffer look into this please?