So early on in my campaigning I got the fungi event chain : I started studying a microscopic organism
when it started to "get out of hand" I decided to jettison the sample.
jokes on me, instead of settling somewhere far away it settles in the middle of my empire on the one space I can't yet claim :
a system with the "Alpha Aliens" with a fighting force of 12.5K. and the two more or less coexist (I'm guessing any space-faring craft or force they might produce will be obliterated by the Alpha Aliens and their starbase stays stuck at 0% health 0% hull, I'm pretty sure this type of eventuality wasn't accounted for, but hey they continue to develop on their planet).
at this very early stage in the game where the best force I can muster is a meager 1.5k. I settle for taking care of them later.
I'm now at the stage where I have a 13.5K force I wager it's time I take that system.
Except I can't :
I don't see what I can do from here?
is this intended behavior or is this a bug?
if it's intended behavior, are they intended to be untouchable or is there another mechanic I'm not aware of to be able to declare war on them/otherwise take the system?