Google maps show devices which are not registered

When client device is registering, MOR puts device IP in database (devices.ipaddr). Google Maps take this IP and show its location.

When device is unregistering, MOR removes device IP from database and Google Maps do not show this device anymore.

However, if client device gets disconnected without unregistration, device IP remains on database and Google Maps keep showing its location.

Device can be removed from Google Maps by registering and unregistering this device correctly.