This device is already owned by a different user

Hi. I create a company dashboard account and write a program use android api. I claim my 2 device over this application with test user. But now icant unclaim this device. On my dashboard, this devices shows under Products tab. But when i try claim this device with it says “This device is already owned by a different user” i know i can unclaim devices over particle CLI but this test user’s not have a valid email and password. like basbdba@asda.asd. i can unclaim one device but another device cannot be unclaimed. How can i recover this device.

I moved a post to an existing topic: How can i unclaime device?