If it can be transferred, see if the spell will accept a suitable substitute, like a doll. I'd think it'd need to have some significance to the person. I saw you guys talking about doing something with a contract, but if it's both a physical contract and a magical one, you might need both still. And if both are still intact, it might let the deal be transferred without any consequences to breaking the deal.
Or look into some kind of purification magic or suppression spell.