Proposed by Mawoin on 10 Dec. 2023 at 12:35 PM
This proposal will make the following change(s):
Update the episodes duration of the anime Grimm Meisaku Gekijou
Change the episodes duration from Unknown to 20min.
Based on the following reason: Missing
With the source: https://anilist.co/anime/4060/Grimm-Masterpiece-Theater/