Contradiction with 2 Samuel 5:17
Both verses describe the Philistines seeking David, but in 2 Samuel 5:17, it specifies the Philistines were aware of David's anointing as king over Israel earlier in the narrative, while 1 Chronicles emphasizes the immediate reaction upon his anointing.
2 Samuel 5:17: But when the Philistines heard that they had anointed David king over Israel, all the Philistines came up to seek David; and David heard [of it], and went down to the hold.