can not deactivate trados 2019 freelance after upadte it to 2021 freelance plus

I have updated my 2019 freelance to 2021 freelance plus, the 2019 freelance still can be used in my old computor, but I can not deactivate it when I want to transfer it to another computor. I can not deactivate it offline too, because my SDL account does not display the license of the 2019 freeance. what can I do? Please help