Thanks.
This has been addressed in this thread.
As noted, we’ve made some recent accounting changes regarding health (structures have health too). That means that in some saves that have enemy structures in them, those structures may not be accounting for their health properly.
If your goblin campfire existed in a save when you updated to the latest build, it will be a victim of this change. The way to fix this is to use the “destroy” command from the console.