Unknown MAC Addresses in DHCP IPv4 Lease

[mush2020]

I'm seeing many unknown mac addresses in DHCP IPv4 lease.
Hostname is same but 2 different IP addresses and mac addresses.

I'm trying to find from where the unknown mac address is logged
In Windows Random mac address assignment is disabled.
Even Android host shows mac address shows same first 6 digits 02:0c:43

Can anyone help to resolve this issue

log file entry of windows host
xx:xx:72:b0:da:5b is actual mac address
02:0c:43:b0:da:5b this is unknown

2022-01-30T11:40:44   dhcpd[27070]   DHCPACK on 192.168.10.99 to xx:xx:72:b0:da:5b (Laptop) via igb2
2022-01-30T11:40:44   dhcpd[27070]   DHCPREQUEST for 192.168.10.99 (192.168.10.254) from xx:xx:72:b0:da:5b (Laptop) via igb2
2022-01-30T11:40:44   dhcpd[27070]   DHCPOFFER on 192.168.10.99 to xx:xx:72:b0:da:5b (Laptop) via igb2
2022-01-30T11:40:44   dhcpd[27070]   DHCPDISCOVER from xx:xx:72:b0:da:5b (Laptop) via igb2
2022-01-30T11:40:44   dhcpd[27070]   DHCPNAK on 192.168.10.31 to xx:xx:72:b0:da:5b via igb2
2022-01-30T11:40:44   dhcpd[27070]   DHCPREQUEST for 192.168.10.31 from xx:xx:72:b0:da:5b via igb2: lease 192.168.10.31 unavailable.
2022-01-30T11:34:12   dhcpd[27070]   DHCPACK on 192.168.10.31 to 02:0c:43:b0:da:5b (Laptop)  via igb2
2022-01-30T11:34:12   dhcpd[27070]   Wrote 75 leases to leases file.
2022-01-30T11:34:12   dhcpd[27070]   DHCPREQUEST for 192.168.10.31 (192.168.10.254) from 02:0c:43:b0:da:5b (Laptop)  via igb2
2022-01-30T11:34:11   dhcpd[27070]   DHCPOFFER on 192.168.10.31 to 02:0c:43:b0:da:5b (Laptop)  via igb2
2022-01-30T11:34:11   dhcpd[27070]   DHCPDISCOVER from 02:0c:43:b0:da:5b (Laptop)  via igb2
2022-01-30T11:34:11   dhcpd[27070]   DHCPNAK on 192.168.10.99 to 02:0c:43:b0:da:5b via igb2
2022-01-30T11:34:11   dhcpd[27070]   DHCPREQUEST for 192.168.10.99 from 02:0c:43:b0:da:5b via igb2: lease 192.168.10.99 unavailable.