Workarounds: go to the default VLAN settings, and change DHCP duty to the main controller only. After that, the main controller will stop producing such error logs, and the DHCP service now working as expected.
Workarounds: go to the default VLAN settings, and change DHCP duty to the main controller only. After that, the main controller will stop producing such error logs, and the DHCP service now working as expected.