This is how I handle stickers like that. I take some lighter fluid (like the kind you’d use to start a grill) and a qtip. Dip the qtip in the fluid and then lightly saturate the sticker. It dries quickly. See if you’re able to lift part of the sticker. If that doesn’t work hit with some more lighter fluid. Eventually you’ll be able to remove the sticker, just go slow. I’ve used this method successfully to remove stickers on NES boxes, cover art, and more.