Jeconiah - Zedekiah not being popular, the people would have preferred the young king, who had not reigned long enough to make enemies. Probably also Zedekiah had started for Babylon Jeremiah 51:59.
Related Commentaries of Jeremiah 28:4
Jeremiah 28:4
4 And I will bring again to this place Jeconiah the son of Jehoiakim king of Judah, with all the captivesa of Judah, that went into Babylon, saith the LORD: for I will break the yoke of the king of Babylon.