What does 2 Chronicles 35:15 mean?

The musicians, descendants of Asaph, stayed at their posts as David, Asaph, Heman, and Jeduthun the king’s prophet had ordered. The gatekeepers were at every gate. No one had to leave their assigned spot, because their fellow Levites took care of everything else. 2 Chronicles 35:15 - Modern Text Bible

(Everyone sticks to their role, and the Levites make sure all the details are covered so worship can go smoothly.)