question about updating cubase 12 pro

because after more unsuccessful attempts to log in so I can update my 8 pro can I buy an update with another email and acces cod to enter it through my ID log where I have all the data or must from the same email

Hi and welcome to the forum,

Be aware, the Steinberg Shop is operated by AskNet and the system is not linked to the MySteinberg. So you could have different email address (credentials) in the shop comparison to your MySteinberg credentials.

That means, you can buy the update by using any credentials. Once you will upgrade the license, in the Steinberg Activation Manager, you would need to sign in to the MySteinberg account, where your Cubase Pro 8 license is registered (to be precise, the USB-eLicenser with this license is registered).