Stuck in story mode

I’m at the mission when you attack bandits and cumans’ fortress in the abandoned village with Radzig and Divish troops. (I don’t know the name in english, in spanish It is called “Bautismo de fuego”).

The game recognises enemies as allies so If my mates kill them, I lose because a lot of allied soldiers have died, so I can’t continue with the story mode… I need help, I can’t play the game anymore if i don’t solve this.

I had this issue but once I killed the archers in the second part once you move the cart, I stop having this issue. You could also try loading a previous save if that doesn’t work.