How to cancel a mission? (Far Cry: New Dawn)

In General, I went with a crappy weapon on a boss-fight with the twins (because before it was a mission where took away all the weapons, but I'm on the bench and did not return), and ... It's very little of that, so defeating them becomes impossible. When exiting the battle, writes that the mission failed, and throws the checkpoint, and I to the bench to get to, and take a normal weapon. So here I am in this impasse, what to do?


PS Decided. Turns out that if you re-enter the game, the mission is canceled.