Of course, Sanjay, I had done the factory reset before wizzard.
Yes, I will try to add the new SZ-100 to the existing Cluster.
The limitation in my LAN: I can not give new ip address to new SZ100.
The wizzard possible only with the same ip address with old failover SZ100 which will be switching off.
I just want to understand clearly what should I do whith failover ControlPlane.