Official comment
@Mike > Deactivating the license only makes it available for activation on another computer within your Pioneer DJ account. The other user is likely trying to activate it to his Pioneer DJ account. You're taking the right steps with the ticket, and I see you managed to successfully create one 7 minutes after this post, so I'll leave our support team to get to it (they're back in the office on Monday), plenty of time to get it liberated for the other guy before his gig. ;)