Unregister the Host from the Group
You can use the HPE Storage Host Diagnostics Registration Tool to remove the registration for the Windows host from the group. If you want to register the host with a different group, you should remove it from the current group.
This tool is installed when you install the HPE Storage Toolkit for Windows.
NOTE: A host can be registered with only one group at time. If you want to register
a host with a different group, you must first unregister from its current group.
Then you can register with a new group.