Gee....ummmm why don't u know it?
Ok...the promise fulfillment came after the law, hence no more tutor of gal 3:22-25.
19Why then the
law? It was added because of transgressions,
until the offspring should come to whom
the promise had been made, and it was put in place through angels by an intermediary
So chronologically, the no sin, no transgression of 4;15, was after the law, where the no sin no law of Romans 5;13 was before the law, as it clearly says. SIN WAS IN THE WORLD, FROM ADAM, BEFORE THE LAW.
UNTIL 3;19..UNTIL...THE PROMISE.
Done!