RouterOS v6.32.2 "dhcp,error" every 6 hours

Hello,

smth strange in the logs appears every 6 hours. Any ideas?

Time Sep/26/2015 09:26:09
Buffer memory
Topics dhcp error
Message invalid width of classless route: 4294967253

screen - https://www.dropbox.com/s/ptvgxy0dlnhp5kj/Скриншот%202015-09-27%2022.03.10.png?dl=0