Every poster in here is valid (there's no "only the one I put in is the right one"), so maybe other people like a different one more and therefore vote one down/another one up to see their preferred one? Btw .. if I click on your link I don*t see that poster.

did you not see the thumbnail used on the link

I get to see one of the pictures that's used as backdrop here.

Which also has a poster variant here https://image.tmdb.org/t/p/original/koLaqyQNGx75aCjD3pnVI8kEQz7.jpg

https://image.tmdb.org/t/p/original/fjsHNZPFN7kT3B6NeiRmfChM8p2.jpg ... this is the one I see on Gaga. And yes there are diffent posters in here and as long as they're not fanmade or anything like that, it can be used as main poster. Like I said maybe others like a different one more. I personally don't care much about that.

at least don't artificially upscale it when the image quality was already not great

This one keep getting chosen as the main poster and it's upscaled https://image.tmdb.org/t/p/original/h4VCAvs9KElK3k5Zuub3lsDbupp.jpg

original image https://x.com/gagaoolala/status/1800468066649657659

I agree that there's no need to upscale posters ... the same way I don't see any need for the same poster being posted more than once. But which one is voted "the best" is unfortunately depending on voting by users. I hope one of the admins/mods will help with the problem.