Oh, I see. Sorry I didn't see what you meant!
I'll do my best to explain
I discussed it with a friend (who is more knowledgeable than I). I hope this answers your question
We find in Hebrews 1:1-2: “God, after He spoke long ago to the fathers in the prophets in many portions and in many ways, in these last days has spoken to us in His Son, whom He appointed heir of all things, through whom also He made the world.”
This change was foretold in Jeremiah 31:31-34: “”Behold, days are coming,” declares the LORD, “when I will make a new covenant with the house of Israel and with the house of Judah, not like the covenant which I made with their fathers in the day I took them by the hand to bring them out of the land of Egypt, My covenant which they broke, although I was a husband to them,” declares the LORD. “But this is the covenant which I will make with the house of Israel after those days,” declares the LORD, “I will put My law within them and on their heart I will write it; and I will be their God, and they shall be My people. They will not teach again, each man his neighbor and each man his brother, saying, ‘Know the LORD,’ for they will all know Me, from the least of them to the greatest of them,” declares the LORD, “for I will forgive their iniquity, and their sin I will remember no more.”” Notice that God said the covenant would differ from the law given to Moses. This isn’t a change of mind… as these verses clearly show, this change (upgrade) was planned from the foundation of the world! God planned to send his Son and that through Jesus we would obtain salvation (I Peter 1:19-20, II Timothy 1:9, II Thessalonians 2: 13-14).
There was a change in the covenant. There was nothing wrong the Old covenant, but the people were unable to keep it. It defined what sin was, but it brought no escape. It offered only hope for the future (Romans 7:7-13). In the end, it is Christ Himself that freed us from sin and the law. (Galatians 4:21-31; 5:1-4).
Paul said that the Old Law was nailed to the cross (Colossians 2:14). In Ephesians 2:15, we learn that the law was put to death on the tree. Hence, the law ceased to be binding when Christ died on the cross. As we find in Hebrews: “For where a covenant is, there must of necessity be the death of the one who made it. For a covenant is valid only when men are dead, for it is never in force while the one who made it lives.” (Hebrews 9:16-17).