Why do I need a new activation key after replacing SSD instead of HDD

I just replaced the solid state drive and put all programs via time machine backup on my new SSD... Now Parallels ist telling me, that I need an new activation key. What can I do?

To complete my question below.
I have 6 Licenses for Parallels and I will replace all my HDD´s with SSD´s. And I will NOT buy new activation keys....

 

Hello KlausP1,
Please let us know the error message you get while trying to activate Parallels Desktop on your Mac's, so that we can check and assist you better.

 

"your activation is not possible, you have reached the maximum activations for your activation key"

 

Hi Klaus,
Please check your Private message.

 

Hi Klaus,
Please check your Private messages, we have sent a private message.