Shift AP to new OVC account

I did not release the equipment from the old demo instance which is expired. I have a new demo account to which i need to add these AP. How can I do that? The following is the error I get when i try to add the serial number to this instance. "The serial number(s) SSZxxxxxx of device(s) already existed in OV"

Removing devices from OVCirrus catalog in an OVCirrus instance where licenses have expired can be done by being connected on the generic OVCirrus URL for Freemium tenants ( with your credentials.