"Could not create a backup" Apple Configurator issue
I manage two carts of iPads (iOS 8.1.3) for my small junior high school. We use Apple configurator to supervise them and to Check out/Check in. I currently have four iPads that are in the setup assistant mode but the configurator still thinks they are checked out to students. When I attempt to check them in I get an error message that reads, "Could not create a backup. The device is showing the setup assistant" and when I show details it shows Code 4. Consequently, I cannot check out another device to these students as the Configurator thinks they have already been assigned a device.
Any ideas for me?
Thanks!
iPad, iOS 8.1.3