According to the author of Genesis, this verse tells us about a man named Reu who became a father to a child named Serug when he was 32 years old. It's part of a family history showing how families grew a long time ago.
Genesis 11:20: And Reu lived two and thirty years, and begat Serug: [Serug: Gr. Saruch]
This verse contradicts Genesis 11:20 by differing in the name or figure in the genealogy, which creates inconsistencies in the timeline or lineage.
Genesis 11:26: And Terah lived seventy years, and begat Abram, Nahor, and Haran.