Throughout the Old Testament, God refers to the Law of Moses as "my law".

Behold, the days are coming, declares the LORD, when I will make a new covenant with the house of Israel and the house of Judah, 32 not like the covenant that I made with their fathers on the day when I took them by the hand to bring them out of the land of Egypt, my covenant that they broke, though I was their husband, declares the LORD. 33 For this is the covenant that I will make with the house of Israel after those days, declares the LORD: I will put my law within them, and I will write it on their hearts. And I will be their God, and they shall be my people.
Jeremiah 31:31-33 ESV

Jeremiah uses this phrase 6 times, 4 times before chapter 31 and 1 time after. In those other 5 instances, it clearly refers to the Law of Moses, yet many Christian theologians today insist that God suddenly changed what he meant by "my law" in Jeremiah 31.

Metanomianism is wishful thinking.