Hi Anthony,
Try the below steps
Kindly find the below command to change the Cluster name.
ruckus(config)# cluster-name
example : ruckus(config)# cluster-name ruckus
Here are the steps.
>>> If it is a single node then it is fine.
>>> If you have Leader and Follower, first login to the Leader, change the cluster name from the command cluster-name
>>>All the services on both the controller will restart.
>>>Once the restart is done, check the cluster information on the GUI and check if the leader and follower remains the same.
Please perform this operation during downtime.