What does 1 Kings 22:24 mean?

Then Zedekiah, son of Chenaanah, came up and slapped Micaiah in the face. He said, 'Since when did God’s spirit leave me to talk to you?' 1 Kings 22:24 - Modern Text Bible

(Zedekiah, one of the false prophets, reacts violently and mocks Micaiah, claiming he’s the true messenger.)