This read-only TruthValue indicates whether the startup configuration database (CDB) differs between the router's two most recent reboots. An admin checks it to detect whether someone changed the saved startup configuration between reboot cycles, which is useful for change-tracking and troubleshooting unexpected behavior after a restart. For example, after an unplanned reboot, an admin would read this object to help determine whether the device came back up with a modified configuration rather than the expected one.