I just took over a altarian world that had an economic capital on it. I wanted to make it my research planet since it was waty in the back of my borders and didn't even have any useful trade routes to it for the economic capital. But when I try to highlight the econominc capital it won't give me the option to decommision it. So now I'm stuck with a useless econ capital that was left over from the altarians. how do i get rid of it???