How to deactivate a device from account
You can deactivate a device from an account using the Remove Device option in settings. This will remove the device from the account and allow it to be added into another account.
Open your dashboard account and select the device.
Select the Settings tab.
Scroll down and use the Remove Device option.
What happens to my data if I delete my device?
Removing a device from the account will also clear device history. When that device is re-added to a new account, history for the device will start fresh.
If you would like to do an in-place replacement of the hardware without losing history, see How to replace a device without losing history .