[2.60] Unkillable Khaak station in Pious Mist IV

[mr.WHO]

I have unkillable Khaak station that aggro significant (couple destroyers and bunch of fighters) force of Paranid.

It doesn't take any dammage both OOS and IS (I tried to shoot it personally with heaviest stuff, like destroyer weapons and torpedo salvos).
That station doesn't take any dammage, but my main problem is that Paranid waste their forces instead fighting with HOP.

[XTC0R]

I have this too and was told all khaak stations are indestructable.