Most commentaries (actually all of them) that I looked up do not try and create an argument that would escape a copyists mistake in the manuscripts that are available to us today. It seems that it was quite easy to make a copyists mistake with Hebrew Numerals that would go undetected by other copyists due to the confusion of reckoning dates.
Here is one explanation of what it should possibly read.
This synchronistic statement is not only at variance with v. 10, but cannot be very well reconciled with 2 Kings 12:1. If Jehoahaz began to reign in the twenty-third year of Joash king of Judah, and reigned seventeen years, his son cannot have followed him after his death in the thirty-seventh year of Joash of Judah, as is stated in v. 10, for there are only fourteen years and possibly a few months between the twenty-third and thirty-seventh years of Joash; and even if he ascended the throne at the commencement of the twenty-third year of the reign of Joash and died at the end of the thirty-seventh, they could only be reckoned as fifteen and not as seventeen years. Moreover, according to 2 Kings 12:1, Joash of Judah began to reign in the seventh year of Jehu, and therefore Athaliah, who ascended the throne at the same time as Jehu, reigned fully six years. If, therefore, the first year of Joash of Judah coincides with the seventh year of Jehu, the twenty-eighth year of Jehu must correspond to the twenty-second year of Joash of Judah; and in this year of Joash not only did Jehu die, but his son Jehoahaz ascended the throne. Consequently we must substitute the twenty-second year of Joash, or perhaps, still more correctly, the twenty-first year (Josephus), for the twenty-third. If Jehu died in the earliest months of the twenty-eighth year of his reign, so that he only reigned twenty-seven years and one or two months, his death and his son’s ascent of the throne might fall even in the closing months of the twenty-first year of the reign of Joash of Judah. And from the twenty-first to the thirty-seventh year of Joash, Jehoahaz may have reigned sixteen years and a few months, and his reign be described as lasting seventeen years. (Keil, C. F., & Delitzsch, F. (1996). Commentary on the Old Testament (Vol. 3, p. 266). Peabody, MA: Hendrickson.)
Note: For those who believe in the infallibility of scripture as originally written, small mistakes like this do not cause us any discomfort. The miracle is that from human standards these cracks are so small and few.