the best way is to prevent IAP cluster from reaching your Airwave. This will give you the configuration ability for the IAP cluster.
Then remove the Airwave configuration from the IAP cluster.
Now check the configuration for the IAP cluster and once all is good
you can create a new Group in Aruba Central and import the configuration
https://www.arubanetworks.com/techdocs/central/latest/content/nms/groups/import-config.htmAs always try it out in the lab first .
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Any opinions expressed here are solely my own and not necessarily that of Hewlett Packard Enterprise or Aruba.
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