What does Jeremiah 52:31 mean?

In the thirty-seventh year of the exile of Jehoiachin, king of Judah, on the twenty-fifth day of the twelfth month, Evil-merodach, king of Babylon, released Jehoiachin from prison and treated him kindly. Jeremiah 52:31 - Modern Text Bible

(After decades in prison, the exiled king Jehoiachin is finally freed and shown kindness by the new Babylonian king.)