Yes I can see the problem here , Ihad the opposite problem had a blow out early one morning ,came to get the spare off and the bolt had rusted into place ended up snapping and then had to stick the flat in boot and use some tape to keep the cage in place bother !!!!!
so word of warning to u all keep the the thread on that bolt oiled or greased up I recoment the copper grease ,and keep a pair of thin gloves and wet wipes happy motoring all