OOC: That should only happen if someone fighting battles during the AI turn or the chancellor had a modified unit and/or buildings file that is not from KOTRfix. It can also occur if a move_character cheat is used then (especially on sieged settlements). There are of course also very rare occurences where this happens randomly. Those affected units should be disbanded (and possibly recreated) or banished to some place where they will not engage in battle to prevent any further problems from occuring.