The Septuagint has never been located so it is believing in a ghost . There is no proof of its existence
May I suggest further study?
Well, no less than four incomplete, and substantially contradictory, versions are in existence.
Where they came from no one knows. Basing Old Testament Scripture on any "version" of the Septuagint is suspect.
I defer to the Jews for correct O.T. Scripture.
ROMANS 3:
1 Then what advantage has the Jew? Or what is the value of circumcision?
2* Much in every way. To begin with, the Jews are entrusted with the oracles of God.
It seems the Greeks have an advantage only in the Catholic version.