I have Cubase 6 , I bought Upgrade from Cubase 6 artist to Cubase Artist 10 , installed it successfully but when I run activate code don’t want upgrade Cubase 6 ! 
I have Cubase 6 , I bought Upgrade from Cubase 6 artist to Cubase Artist 10 , installed it successfully but when I run activate code don’t want upgrade Cubase 6 !