2299b226__Configuration_Synchronization__status_for_individual_devices_Sync_Status
[Color] Red The device does not have a config sync address. Recommended action: Log into the relevant device, and using the Device Management > Devices screen, specify the IP address that you want remote devices to use to sync configuration data to the device. As a best practice, this address should be a non-floating self IP address associated with an internal VLAN. The address must either be on the same subnet as the other devices in the device group or have a route to that address defined on the other devices. [Sync Status] 
No config sync address has been specified for this device.
AskF5 | Manual Chapter: Managing Configuration Synchronization
Sync Status