[chef] HWRP Array attribute not reset

["Stewart, Curtis" < >]

I’m working with a custom HWRP, and I have an attribute of type Array. 

The definition is below, and the issue I’m trying to trouble shoot is that if I update the value of my array, instead of resetting the array, they new values are appended to the array.

    def external_addresses(arg = nil)

      set_or_return(:external_addresses, arg, :kind_of => Array)

    end

Thanks for any feedback,

Curtis