I have a license of SDL Trados Studio 2021 Freelance

I have a license of SDL Trados Studio 2021 Freelance in another computer that crashed. 

I have reinstalled I have a license of SDL Trados Studio 2021 Freelance in my new computer but I can't deactivate the license from my previous computer. 

I would like to know how I solve it because if I can't deactive the license from the previous computer, I ca'nt reactive it in th new one either.