A user seems to object to their (sometimes highly rated and accepted) answers on questions that were migrated to DIY from EE years ago (2016-2018), and is vandalizing these answers (editing them to just read a statement). The user has already reaped the benefit of substantial reputation gains from these answers, as they're usually well-regarded and solid answers. And to be clear, the user is not deleting the answers (which would be unfortunate, but perhaps understandable) but just editing them to read a boilerplate "I disagree with this answer being migrated out of EE.SE" message.
Some other active users and I have rolled these answers back to a useful pre-vandalized version, but what should be done about these long-term? If the user has issues with their answers being migrated along with the question, is there a way to detach them from that user's account?