What does 1 Chronicles 9:19 mean?

And Shallum the son of Kore, the son of Ebiasaph, the son of Korah, and his brethren, of his father’s house, the Korahites, were over the work of the service, keepers of the thresholds of the tent: and their fathers had been over the camp of Jehovah, keepers of the entry.

And Shallum the son of Kore, the son of Ebiasaph, the son of Korah, and his brethren, of the house of his father, the Korahites, were over the work of the service, keepers of the gates of the tabernacle: and their fathers, being over the host of the Lord, were keepers of the entry.

And Shallum the son of Kore, the son of Ebiasaph, the son of Korah, and his brethren, of his father’s house, the Korahites, were over the work of the service, keepers of the thresholds of the tent: and their fathers had been over the camp of Jehovah, keepers of the entry.

And Shallum, the son of Kore, the son of Ebiasaph, the son of Korah, and his brothers, of his family, the Korahites, were responsible for everything which had to be done in connection with the order of worship, keepers of the doors of the Tent; their fathers had had the care of the tents of the Lord, being keepers of the doorway.

And Shallum son of Kore, son of Ebiasaph, son of Korah, and his brethren, of the house of his father, the Korahites, <FI>are<Fi> over the work of the service, keepers of the thresholds of the tent, and their fathers <FI>are<Fi> over the camp of Jehovah, keepers of the entrance;

But Sellum the son of Core, the son of Abiasaph, the son of Core, with his brethren and his father's house, the Corites were over the works of the service, keepers of the gates of the tabernacle: and their families in turns were keepers of the entrance of the camp of the Lord.

And Shallum the son of Kore, the son of Ebiasaph, the son of Korah, and his brethren, of the house of his father, the Korahites, were over the work of the service, keepers of the thresholds of the tent, and their fathers, set over the camp of Jehovah, were keepers of the entrance.