Changing Host name in Navisphere

One of my AIX boxes has changed roles and names. The HBAs are still logged in and registered to the old name. This will cause problems in the future so I want to change the name of the host. I can change the Storage Group name but not the registered name and cannot deregister the logged in name. I assume I could block the port on Connectrix and then deregister the non logged in HBA, remove the host from the Storage Group and then re-register to the new host name, but I'm hoping for a easier way to change the host name.

If any ideas, I'd appreciate them. TIA Harold