Ah, they're two different things. Thanks man. That's a bummer, can't even get catharsis now. I mean I guess I could sit outside the no fire zone and snipe the patrols with dumbfires or long range railguns or something but there's just no catharsis in that y'know? Oh well.Detention centres can't be flipped - they have only a single faction present, can't be expanded into, and the faction which is present is a non-influence faction so even if you somehow managed to bug another faction in, you couldn't do anything with it.
Prison Colony systems are just another government type and can be flipped as normal.