What should I do if the alliance cannot be removed?

I'm creating a scenario for the standard Heroes of Might and Magic V version 1.60. I'm having a problem: I can't remove the alliance. I made a script for the map and then decided to test it. I launch the game, see the alliance, remove it in the editor, then launch the game again, and the alliance is still there. But! When I hadn't written the script yet, the alliance wasn't placed.