Use of Studio 2019 on a new pc and keep 2017 on the old one?

Hello, my new pc will arrive in a few days and I have bought the upgrade from Studio freelance 2017 to Studio freelance 2019. Is it easier to wait some days and install 2019 directly on the new one? I have read something link "return the licence to SDL befor using the same license on a new pc"... is this right? So it would be better to make everything on the new one, right? Can I use ma old one as a "back-up-pc" with Studio 2017? And the new one with Studio 2019? Soorry, but downloads, installations, licensing is not my strenght... thank you in advance!