The Router Advertisements Server is active on this interface and it can be used only with a static IPv6 configuration

[Quarkz]

Complete error message: The Router Advertisements Server is active on this interface and it can be used only with a static IPv6 configuration. Please disable the Router Advertisements Server service on this interface first, then change the interface configuration.

For the last couple 2.6 builds I have been receiving this error on my internal physical em1 interface.

I have IPv6 Configuration Type set to None so I am not quite sure what to do to fix the issue and hence no DHCPv6 Server & RA server is defined.

Any thoughts?