Instance prefab's change, modify other instances of the same prefab

Good morning. Someone could tell me why, when I modify the size of an instance of a prefab in a scene, it also modifies the size of another instance of the same prefab that is in another scene? Thank you very much

Simply because it’s the same prefab, if you want them to be different sizes, just make another prefab for the other scene. Either that or modify the size of the object in the scene rather than the prefab.

ok, but i am changing the size of instance of the prefab in the hierarchy panel, not the prefab’s size in the project panel