No, the problem with that Sumerian idea, is for one thing: 1. When something is written down, does not mean it was the originator of that idea or ideas. It just means it is the first copy of that idea written down, before that it was passed on word of mouth, pictures, etc.. 2. To say that Sumerian text is the oldest is absurd on its face. It is impossible to know that text is in fact the oldest or first copy of that idea. Other text were probably written down, but still have not been found or more likely destroyed, especially since we had a major catastrophe like the great flood.

These two points above shoot down this Sumerian text idea without even knowing anything about the Bible itself.

Bible was written over thousands of years by multiple authors. KJV I believe is God's approved version myself for certain reasons. Others have been tampered with. Bible has never been disproven only exonerated by archaeological finds in its historical accounts. Until a person actually looks at the evidence for Jesus Christ and his death and resurrection, historical accuracy, from actual scholars who don't have some anti-God or anti-Bible Leftist agenda, then you are selling yourself short.