What does 1 Chronicles 6:33 mean?

Once the temple was finished, these men and their families continued their musical duties. Here are their names: Heman, the main musician, was the son of Joel, who was the son of Samuel. 1 Chronicles 6:33 - Modern Text Bible

(After the temple was built, the same families kept leading worship. Heman is named again as the chief musician, and his ancestry is repeated for emphasis.)