Aktiia device is meant for personal use only and should not be shared.  

In case the same device is being paired to two different accounts, this message will be displayed. Ensure that only the Aktiia Bracelet you are trying to pair is on the charger and /or ensure the Aktiia cuff you are trying to pair is the only one switched on.

If the problem persists, contact support at support@aktiia.com.