What does 1 Kings 22:32 mean?

When the chariot commanders saw Jehoshaphat, they thought, 'That must be the king of Israel!' So they turned to attack him, but Jehoshaphat cried out. 1 Kings 22:32 - Modern Text Bible

(Jehoshaphat is mistaken for Ahab because of his royal robes, and he’s almost killed until he calls out.)