OK, I’ve got some feedback from the backend team. They think we should trust the error message! Meaning that, even though the device is now in another application, it would still be running a release of the original application. I don’t have access to the device to confirm it (support access not granted to it), but if you visit the device’s dashboard page, you may find that it is running a release that belongs to another application: https://dashboard.balena-cloud.com/devices/1c72c5576e18f3ec98defefdab15f013/summary
If the device is offline and happens to be unused or no longer needed, you could try deleting it. If the device is actually running a release that belongs to its current application, then perhaps you could share the release ID (or grant support access to the device), so I could go back to the team. Thanks.