I am thinking about starting again with a new master key. My current master key was not compromised, but I had stored it on my private server temporarily, which is against good practices (but I am the only one who can access this server and the key is protected with a very strong passphrase).
Assuming I want to move to a new master key, is there a way I can tell the world that I want to deprecate my old key, e.g. by "promoting" a subkey, or by signing my new master key with my old one? Or should I just revoke my old key, make a new one, and start re-building my reputation from scratch?