Lens stuck on body - seems like it was mounted wrong

Hello! I was gifted a lovely X-570 for Christmas (and yes, the capacitors are in great shape lol). However, the lens it shipped with seems to have been mounted wrong and it’s now trapped on the body. The tab on the body is caught on the wrong side of the lens tab (from the aperture control). I have no idea how they jammed it on there, but I can’t get the dang thing off. Any tips?