PRCS-01136
unable to set the candidate server list for a server pool to a list of servers with mixed CSS roles.
Cause
An attempt to set the candidate server list for a server pool was rejected because the specified servers were not all Hub Nodes or all Leaf Nodes.
Action
Retry the operation specifying a list of servers that all have ACTIVE_CSS_ROLE set to 'hub' or that all have ACTIVE_CSS_ROLE set to 'leaf'.