how to change ny activation code ????

i would like to know what to do cause my computer where i install the cubase softwrere is broken now i have a new lap top nad i want to use my softwere but i can…it wont let start the program with a warning window saying that i already use my activation number …waht can i do ??? helpppppppp

In mySteinberg
“Activation & Reactivation”
Select your product.
Follow the instructions.