Discount 50% upgrade V15 to V17

[mccs]

Hi,

would like to use the offer to upgrade from V15 to V17.
Got an email with an offer 50% discount and the link to it.
However, on the page of 2Checkout I can only choose:

1 x WYSIWYG Web Builder 17 51.52 € (discount 50% = 25,76 €)
plus
1 x WYSIWYG Web Builder Plus 17 85,90 € (discount offer = 60.16 €)

My Question: Wysiwyg V17 alone can not be upgraded from V15 with discount 50% = 25,76€?
What must I do to upgrade V17 alone?

Thank you.

[Pablo]

Do you mean that you have added multiple items to the cart?
In that case, clear the cart ad dthen only add one item.