If you receive Error code: 15 while trying to activate your rekordbox license key on your device with rekordbox ver. 5 software, it will indicate that you have already reached the maximum number of activated devices to your rekordbox license key.

If you wish to activate a new device, you must first deactivate one from your rekordbox license key.

Check out our article showing you how to deactivate your rekordbox license key on rekordbox ver. 5.