[knot-dns-users] How to move signed zones and keys to another server?

We're consolidating servers, and as a result. I need to transfer some the IPs, zones && keys to other servers. I'm trying to find the least eventful way to accomplish this. I attempted to transfer (signed) zones and IPs once before. But the slaves wouldn't accept the zones and I ultimately had to purge the journals on all the servers I had control of, and re-key and re-sign the zones to make everything work as intended. All the zones are written/kept on disk (except changes that haven't already been flushed to disk from the DB). I'm wondering if it's enough to freeze all the zones on their current serves. Then shutdown the server(s), and transfer the zones, keys, and merge the configs onto the new servers would be the correct way to do this? If not. Please advise. Thank you for all your time, and consideration. --Chris