So I went to The Arbor, started the quest and provoked Dagmer. He said he'd meet me outside the city walls at noon, and he did. When I engage his party though, I don't have the option to attack. I can only surrender, retreat while sacrificing a few units or change the commander. So now I'm stuck with a party of 100 Ironborn following me around the map, which is very annoying. Anyone know a fix?