bugg main quest

With today's 1.0.11 update, the main quest failing after 10 years was fixed, my question is do you have to make a new save if your current one already has the quest failed, or is there some work-around to get the quest back up and running again?

Hey guys, i managed to bug the quest where you need to destroy a bandit hideout for Arzagos. I was allied to the Battanian kingdom while i got the quest and they where in a war with the western empire. Befor i could clear the hideout the western empire conquesred the city Arzagos is staying in...