Contradiction with 1 Chronicles 11:10
It lists David's mighty men, and might conflict with naming or numbering discrepancies from 1 Chronicles 11:26.
1 Chronicles 11:10: These also [are] the chief of the mighty men whom David had, who strengthened themselves with him in his kingdom, [and] with all Israel, to make him king, according to the word of the LORD concerning Israel. [strengthened...: or, held strongly with him]
Contradiction with 2 Samuel 23:8
It provides a different account of David's mighty men with variations in names and numbers.
2 Samuel 23:8: These [be] the names of the mighty men whom David had: The Tachmonite that sat in the seat, chief among the captains; the same [was] Adino the Eznite: [he lift up his spear] against eight hundred, whom he slew at one time. [The Tachmonite...: or, Joshebbassebet the Tachmonite, head of the three] [whom he...: Heb. slain] [he lift...: from (1ch:) whom he...: Heb. slain]