Hi @Kevin1
You should be able to modify the cluster data source by clicking the configuration tab in AIQ and select "cluster data sources" in the tree view.
You should be able to select your cluster from here and edit the entry for hostname/IP address of the cluster management IP.
You may have to click "rediscover" after making your modifications.
You may be able to avoid this in future by using the cluster host name instead of the IP address.
Let me know if this works out for you.