Contradiction with 1 Chronicles 6:32
This verse refers to the roles of the singers in the house of the Lord, contrasting with the roles of gatekeepers mentioned in 1 Chronicles 26:19.
1 Chronicles 6:32: And they ministered before the dwelling place of the tabernacle of the congregation with singing, until Solomon had built the house of the LORD in Jerusalem: and [then] they waited on their office according to their order.
Contradiction with 1 Chronicles 15:16
This verse describes David appointing singers and musicians rather than gatekeepers, contrasting with the temple services in 1 Chronicles 26:19 involving porters.
1 Chronicles 15:16: And David spake to the chief of the Levites to appoint their brethren [to be] the singers with instruments of musick, psalteries and harps and cymbals, sounding, by lifting up the voice with joy.