Security subscription on factory resetted system

[raspypi]

System model is Netgear Nighthawk MK62

Hello, today i sold my old MK62 system to a relative but i still have about 9 months of the pro security left on my account that i made. I was wondering if it was possible to put it back on that system, i factory resetted both the router and satellite with the button on the back. I told him that I would give him the info to the account that has the security on it but i dont know if it will still have those 9 months left cause i resetted the routers. I assume it will still have the subscription because it connects to the router's serial number but i just want to make sure. did i just throw 9 months worth of a pro security subscription away?

[plemans]

It should still work after the install. 

I know you have to contact customer service to transfer a subscription to a new device so I'd imagine it'd stay with an old one if you didn't go through the transfer process. 

https://kb.netgear.com/000060888/How-do-I-transfer-my-NETGEAR-Armor-subscription-from-one-NETGEAR-pr...