Where is this warning from?

Question

Windows Server

Good afternoon!
After an unexpected power outage on the server, the following warning appeared in the system logs:

Порту "SWITCHPORT-SM-16465A2A-3CEF-48A7-AA05-D39EBFFF1A84-0-1" было запрещено использовать MAC-адрес "00-25-90-67-2A-E7", поскольку этот адрес привязан к порту "SWITCHPORT-SM-16465A".

Moreover, this warning pops up every second, after the time has elapsed, the server is rebooting, it seems to me that the server is rebooting due to this warning.
In which direction to dig to see what is causing the reboot.

Answer 1

SWITCHPORT-SM-16465A2A-3CEF-48A7-AA05-D39EBFFF1A84-0-1

Remove this port from the SWITCHPORT-SM-16465A2A network adapter.

Answer 2

If I do not confuse this warning with some other, then we had this because of the "ring".