How do I unlink a guest user to a username?

I played several rounds with a friend. He later installed the UDisk and I linked his rounds to the username. Unfortunately, I selected the wrong username. Can this process be undone?

Hi, thanks for asking your question here! If you will reach out to us at help@udisc.com and provide your username, the incorrect username you entered, and what the correct one should be, we can definitely assist with this!