Purchasing another individual license

Hi all, want to purchase another individual license, I am facing a red not says:
Individuals can not acquire more than 1 license. If you want to renew your existing license key, please tick the checkbox “Use my current license keys”.
I can not find any checkbox with that “Use my current license keys” label.

How can I find this checkbox or how to renew my previous license?

Thank you

Hi Ahmad,
Please try again. Now you should see the checkbox on the Studio purchase page.