Kingdom Loss (Mount Blade 2: Bannerlord)

Hello everyone. I had a faction. There were wars, then he writes that someone there was tired of the war and united. Now I have cities, but I don't have a faction, I can't assemble an army, look, I've finished all the quests. How can I return all the vassals and my faction as it was? The faction icon says you must be in a faction. In the profiles of my character there is no faction leader, but in the encyclopedia I am the leader. How to fix it? I don't want to do it all over again