Someone keeps removing poster pictures

I have submitted this image multiple times and it shows as accepted and then gets deleted, sometime within the same day and getting replaced with a lower quality picture which is set a default poster. What is going on? I am referring to this title - https://www.imdb.com/title/tt8550890/. I have uploaded poster for this game. What are the specifics of the removal please kindly state and why remove if after accepting?. Poster is from the steam database for the game https://shared.cloudflare.steamstatic.com/store_item_assets/steam/apps/782330/library_600x900_2x.jpg?t=1702308063 , is the official poster available from steam.