Proposed by Mawoin on 09 Feb. 2023 at 03:41 PM
This proposal will make the following change(s):
Update the studios of the anime Muumin
Change the studios from :
Unknown
to
Mushi Production
Based on the following reason: Missing
With the source: https://myanimelist.net/anime/8234/Muumin?q=muumin&cat=anime
