R6900v2

Recently changed ISP and reset Nighthawk with new Wifi network names/passwords. Cannot enable Anywhere Access (Out-Of-Home Controls). Receive “This NETGEAR device is already registered with another account” message. Was able to remotely connect to the Nighthawk prior to the change in ISP. This device has only been registered once under email on file as it was purchased new.

Running Firmware Version: V1.2.0.76.

Can someone please explain how to re-activate the Anywhere Access feature, please?

Thank you.