Well, since there are several protocols supported and active for your adapter, they are trying to get their job done. So, for those you don't need, you can disable them so their job isn't bugging you anymore.
We're probably having the same errors in our configuration, provided we don't have an IPv6 DHCP server active on our network, so it's a logical thing to happen. By disabling the protocols / services you don't need , you disable future system attempts from trying to use them.