So I am just curious how to do this. Any help is appreciated. (And I hope this is not a forbidden topic here.)
The story behind is this: I have discovered many many systems and fully surveyed all of them. Found nothing. To my surprise, when one of my ships passed through such system much much later, they have found a new race and their ships. They weren't there before. And they spread like craaaazy. In a few months they are everywhere. I want to stop them (at least temporarily) by deleting all their ships.
I have looked them up in the db, they are an actual npr, not spoilers. I can even communicate with them (finally). But they have seven gazillion ships.
I tried to delete all their ships, and whatever I thought they might be referenced from: their fleets, their move orders, their civilian trades, even set all their commanders to unassigned. But I still get a ton of errors in function #1415. I even tried to set their shipyards' default fleets to 0, and even tried deleting the shipyards alltogether.
So what else do I need to delete?
Maybe I could just set the ships as destroyed and let the game clean up everything.