Windows Some Shown On Warning State

Hi,
I installed librenms on ubuntu22.4, LibreNMS, Version24.1.0-6. When I validate the Configuration, Everything is OK. there is no error.

But faced some issues, some devices(Mikrotik and Windows server) showed me some times in warning state. Why does it show me a warning state? Please help me to find out. screenshot attached.

Warning only means the device was rebooted during the last day.

See documentation: https://docs.librenms.org/Support/FAQ/#why-does-a-device-show-as-a-warning