What does 1 Chronicles 28:1 mean?

David summoned all the leaders of Israel to Jerusalem: the tribal chiefs, the commanders of the army divisions, the officers over thousands and hundreds, the managers of the king’s property and livestock, his sons, his officials, the elite soldiers, and all the brave warriors. 1 Chronicles 28:1 - Modern Text Bible

(This verse repeats the gathering of all Israel’s leaders, emphasizing the importance of the assembly and the transition of leadership.)