Magic Bands are NOT linked to ANY resort reservation. Magic Bands are linked ONLY to a specific individual on a specific
MDE account. EVERYTHING is stored in the MDE account (resort reservations, tickets. ADRs, FP+, etc). The Magic Band is used as a key to access the account and the various components stored there.
Any and all MBs in an account are interchangeable and usable as long as they have not been damagex or disabled (to do that requires a distinct action on your part).
Steve