I have two validators running, the older one of which will soon run out of disk space. Is it possible to transfer my key from the old validator to the new validator without overwriting anything on the new validator? Is it possible to have two sets of keys on one validator?
Wait why two validators?
You just spin up a new node and copy your validator (keys) from old to new node.(If you have new node config you can retain it on the new node as only keys are copied)