Can't buy an update

Cubase
1

I have version 10. When buying an update on the tab, the address is “An account already exists with that e-mail address. Your e-mail address is already used in the system. Please choose another e-mail address or use your old account.” I can’t figure out what to do?

2

I would assume login and use your old account?

3

Or use another email address?

4

I solved the problem! Thanks!!!

5

How did you solved, Im hacing the same problem