What does Exodus 8:24 mean?

And Jehovah did so; and there came grievous swarms of flies into the house of Pharaoh, and into his servants’ houses: and in all the land of Egypt the land was corrupted by reason of the swarms of flies.

And the Lord did so; and there came a grievous swarm of flies into the house of Pharaoh, and into his servants’ houses, and into all the land of Egypt: the land was corrupted by reason of the swarm of flies.

And Jehovah did so; and there came grievous swarms of flies into the house of Pharaoh, and into his servants’ houses: and in all the land of Egypt the land was corrupted by reason of the swarms of flies.

And the Lord did so; and great clouds of flies came into the house of Pharaoh and into his servants' houses, and all the land of Egypt was made waste because of the flies.

And Jehovah doth so, and the grievous beetle entereth the house of Pharaoh, and the house of his servants, and in all the land of Egypt the land is corrupted from the presence of the beetle.

And the Lord did so. And there came a very grievous swarm of flies into the houses of Pharao and of his servants, and into all the land of Egypt: and the land was corrupted by this kind of flies.

And Jehovah did so; and there came dog-flies in a multitude into the house of Pharaoh, and [into] the houses of his bondmen; and throughout the land of Egypt, the land was corrupted by the dog-flies.