What does 1 Chronicles 15:11 mean?

David called in the priests Zadok and Abiathar, and the Levite leaders Uriel, Asaiah, Joel, Shemaiah, Eliel, and Amminadab. 1 Chronicles 15:11 - Modern Text Bible

(David brings together both the top priests and the heads of the Levite clans, making sure leadership is united for this important moment.)