For even before the law, sin was in the world, but sin was not imputed while the law did not exist
Other versions
King James Version
(For until the law sin was in the world: but sin is not imputed when there is no law.English Standard Version
for sin indeed was in the world before the law was given, but sin is not counted where there is no law.New International Version
for before the law was given, sin was in the world. But sin is not taken into account when there is no law.