According to message "duplicate dhcp-host IP address 10.5.0.2", there should be multiple entries of the same IP 10.5.0.2 in file /var/lib/quantum/dhcp/864facd7-0179-40fe-8928-48c3993b8c00/host, while MAC addresses of the entries may be different.
It seems that in the case dnsmasq server will report error and doesn't allocate IP address for the DHCP request.
According to message "duplicate dhcp-host IP address 10.5.0.2", there should be multiple entries of the same IP 10.5.0.2 in file /var/lib/ quantum/ dhcp/864facd7- 0179-40fe- 8928-48c3993b8c 00/host, while MAC addresses of the entries may be different.
It seems that in the case dnsmasq server will report error and doesn't allocate IP address for the DHCP request.