You could have a key rotation process where you use the old key to install the new key and delete the old key. But it seems sketchy because if you don't rotate

You could have a key rotation process where you use the old key to install the new key and delete the old key. But it seems sketchy because if you don't rotate in time the old key expires and you're locked out. I think in practice you'll always end up with a super-duper secret, rarely used, long term key. Or have some other backdoor like root password, LDAP/Kerberos, ADFS, etc.