Renew NIS 2012 with 2011 Product Key?

Hello & greetings from Indonesia!

 

I have a question about renewing my subscription:

 

I have 10 subscription days left on my NIS 2012 (v19.2.0.10). Now there's a online store in my country that still provides both NIS 2011 & 2012 retail box (NIS 2011 is about $8 cheaper). if I buy the 2011 retail box, is it possible to use its key to renew my NIS 2012 without uninstalling my current NIS first ?

 

any help would be appreciated, thanks !

 

P.S : My product key originally comes from NIS 2010, besides have to uninstall the current version and then install the newer version, I don't have any trouble upgrading to 2011 and (then 2012) version using the same key. Now I just want to make sure if i use the 2011 key, i don't have to uninstall my NIS 2012  first.