Contradiction with Romans 16:25
This verse claims the mystery was kept secret since the world began, whereas Romans 1:2 states it was promised afore by the prophets in the holy scriptures.
Romans 16:25: Now to him that is of power to stablish you according to my gospel, and the preaching of Jesus Christ, according to the revelation of the mystery, which was kept secret since the world began,
Contradiction with Ephesians 3:5
This verse declares the mystery was not made known to people in other generations, which contrasts with Romans 1:2 saying it was promised by the prophets.
Ephesians 3:5: Which in other ages was not made known unto the sons of men, as it is now revealed unto his holy apostles and prophets by the Spirit;