It means there is an MDM profile on this device that might lock the device once reset, MDM profiles are similar in a sense to iCloud accounts as they can restrict future users to have full access to the device
Mobile device management (MDM) is an industry term for the administration of mobile devices, such as smartphones, tablet computers, laptops, and desktop computers. MDM is usually implemented with the use of a third-party product that has management features for particular vendors of mobile devices.
If you are able to connect the device Erasure will some times clear the MDM profile
Select the Device Square
Click on the “E” on the toolbar above to Erase the device
If that doesn’t work, try a Restore
Click on the “R” on the toolbar above to Restore the device
If you still have MDM then the profile can’t be removed
Note: This can also be automated in desktop with "Auto Erase MDM" if MDM is cleared the device app will be installed if not device fails for MDM defect.
Cannot Pair Error
This means the device has a policy on the device which prevents the device from communicating with a computer.
Note: If you place the device into Recovery Mode and Restore with Phonecheck you may be able to read at least the device information to print a label