peer holds all free leases

[Atif Munir]

I am having many messages in the dmesg of  my dhcp server.

Jun  1 14:02:02 ns22 dhcpd: [ID 702911 local7.error] DHCPDISCOVER from
00:21:80:ff:27:19 via 115.167.64.1: peer holds all free leases
Jun  1 14:02:04 ns22 last message repeated 1 time
Jun  1 14:02:05 n22 dhcpd: [ID 702911 local7.error] DHCPDISCOVER from
00:1a:ad:3f:98:42 via 115.167.64.1: peer holds all free leases
Jun  1 14:02:06 ns22 dhcpd: [ID 702911 local7.error] DHCPDISCOVER from
00:21:80:ff:27:19 via 115.167.64.1: peer holds all free leases
Jun  1 14:02:07 ns22 dhcpd: [ID 702911 local7.error] DHCPDISCOVER from
00:1a:ad:3f:98:42 via 115.167.64.1: peer holds all free leases
Jun  1 14:02:09 ns22 last message repeated 1 time

Any idea how we can remove it? Thanks
atif