In Device Manager, you can directly edit the device database. However the changes apply only to the device.
Some device settings can only be changed by directly editing the device database. For example, you can only change the hostname or the IP address for an interface by editing the device database in Device Manager.
After you change the settings, you must install the changes to the device. When you install the changes, the configuration in the FortiManager device database is compared to the configuration on the managed device, and the difference is installed to or removed from the device.
Policy package changes overwrite device database changes.