Apologies if this has been answered elsewhere but I have a question about lockboxes. I understand how to set them up but I'm curious about backup strategies for them. Say you set up a lockbox on one machine and you gather the public keys from elsewhere. Then the host / organizer machine crashes and there isn't a backup of the data on the machine. With the deterministic nature of regular wallets, this can be addressed with a paper / offsite backup of the deterministic keys. How do you back up the lockbox though or make it so another machine can spend from that multisig address if the organizing / original machine ends up becoming corrupt in some way?