Question about using a gifted Parallels license key

Hello,
A friend of mine gave me a Parallels Desktop license key. However, when I tried to activate it under my Parallels account, I received a message saying that the key has already been registered to another account.
I would like to ask:
  1. Is it safe for me to use this key that was previously activated by another person?
  2. Could there be any risk of my personal information or data being exposed if I use this key?
    Thank you very much for your assistance.
 
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