Contradiction with 1 Samuel 8:2
States that the sons of Samuel were named Joel and Abiah, not the names mentioned in 1 Chronicles 6:17.
1 Samuel 8:2: Now the name of his firstborn was Joel; and the name of his second, Abiah: [they were] judges in Beersheba.
Contradiction with 1 Samuel 1:20
Mentions Samuel as the only son of Hannah at the time, conflicting with the genealogical line in 1 Chronicles 6:17.
1 Samuel 1:20: Wherefore it came to pass, when the time was come about after Hannah had conceived, that she bare a son, and called his name Samuel, [saying], Because I have asked him of the LORD. [when...: Heb. in revolution of days] [Samuel: that is, Asked of God]