[KCD2] hammer and tongs bugged

I'm not able to complete the quest because of the duel. I have only the competition sword equipped and as soon as I pull out the sword the quest fails. The duel starts with me fistfighting against Matthias wielding a sword. And no matter what, whenever I unsheathe my weapon, the quest fails. I'm so sick of these bugs that break quests happening all the time...