Try disconnecting the affected host (the one reported with IP conflict), and ping/telnet to the IP 10.3.202.59 see what's going on.
BTW, the MAC address 00:B0:00:E3:71:02 is a device manufactured by China (FUJIAN START COMPUTER EQUIPMENT CO.,LTD in FUZHOU), probably it's not Cisco related. It should be a network card of a PC which is based on some low cost chipset. Try to start thinking from this direction.