Contradiction with Genesis 25:13
The names and order of the sons of Ishmael differ from those listed in 1 Chronicles 1:29.
Genesis 25:13: And these [are] the names of the sons of Ishmael, by their names, according to their generations: the firstborn of Ishmael, Nebajoth; and Kedar, and Adbeel, and Mibsam,
Contradiction with Genesis 16:15
This verse contradicts 1 Chronicles 1:29 regarding the mother of Ishmael's lineage.
Genesis 16:15: And Hagar bare Abram a son: and Abram called his son's name, which Hagar bare, Ishmael.
Contradiction with Genesis 21:21
The account of Ishmael’s settlement locations differs between this verse and 1 Chronicles 1:29.
Genesis 21:21: And he dwelt in the wilderness of Paran: and his mother took him a wife out of the land of Egypt.