It looks like prior to the message you had two additional objects in the Allowed Networks list, is this correct? Can you tell me what they were / post picture?
Was this a profile that was migrated from an 9.1 install and those entries existed there?
We're still trying to figure this one out. Can you post the details (screenshot) of what this "host" object is and how it was created, along with a list of your logical interfaces?
Can you confirm that all you are doing is adding the one host and clicking save?
Although we are tracking this we are having trouble with the reproduction. If anyone has experienced this please let me know what their setup is - especially what devices and interfaces they have.