Even if these contradictions turned out to lack possible harmonization, at best the only outcome would be that we might be compelled to revise our understanding of inspiration or inerrancy. It would in no wise detract from the central truth claims of the Christian faith.
The New Testament is rich with allusions to the Hebrew Scriptures. Regrettably, in modern Christendom, we are largely ignorant of much of the Old Testament, and so these allusions are lost on us. When they are discovered, however, they help to illuminate the Bible’s teachings on the nature of Jesus Christ.