Product key

I have bought (upgraded) my freelance package 2019 to studio 2021. I am asked to click and get the product key. Will this make it impossible to continue to use 2019 on one of my computers? I would like to continue using studio 2019 on the one computer until I buy a new computer to install the second Studo 2021 on. Let me know before I click on that link so I don't do anything wrong here.