Death star bug (Star Wars: Empire at War)

I am going through the conquest of the galaxy for a syndicate, the empire has built a death star, has already destroyed all the rebels and the empire, there is one planet under the control of the empire, there is a death star on it, I attack, I destroy the empire’s fleet, the inscription you won, then my fleet flies to the planet from which it flew a the death star remains unharmed and so permanent, how to destroy it?