What does 1 Chronicles 6:39 mean?

Korah was the son of Izhar, who was the son of Kohath, who was the son of Levi, who was the son of Israel. 1 Chronicles 6:39 - Modern Text Bible

(Now the genealogy reaches all the way back to Levi, one of Jacob's sons. This roots the Levites' authority in the larger story of Israel.)