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That is ARP working as it should. Why that host insists on polling each and every host in it's local subnet is something you need to investigate on the machine itself.

But it could be something as silly as defining a network printer by name and not the IP address. If th machine can't resolve the name it will poll each host on your network t find the printer.

Can you imagine what hapens to a switched network if you use 10.0.0.0/8 as local network?