I messed up things with datacenter naming, I used something else than Default, and the result was that, after the DB welcome message between the engine and the hypervisor, there was in error (I didn't catch it I was using screen command over ssh without log :-( ), and the last steps were not done, so I ended up

an engine up but without the hypervisor being registred.

Is there a way to force the registration again, or will I have to deploy from the beginning and reinstall the VM engine?

thanks.