Adam Clarke on Jeremiah 27:1

In the beginning of the reign of Jehoiakim - It is most evident that his prophecy was delivered about the fourth year of Zedekiah, and not Jehoiakim, as in the text. See Jer 28:1. Three of Kennicott's MSS. (one in the text, a second in the margin, and the third upon a rasure) have Zedekiah; so likewise have the Syriac and the Arabic. Houbigant, Lowth, Blayney, Dahler, and others declare for this reading against that in the present text. And it is clear from the third and twelfth verses, where Zedekiah is expressly mentioned, that this is the true reading.