What does Ezekiel 39:15 mean?

And they that pass through the land shall pass through; and when any seeth a man’s bone, then shall he set up a sign by it, till the buriers have buried it in the valley of Hamon-gog.

And the passengers that pass through the land, when any seeth a man’s bone, then shall he set up a sign by it, till the buriers have buried it in the valley of Hamon–gog.

And they that pass through the land shall pass through; and when any seeth a man’s bone, then shall he set up a sign by it, till the buriers have buried it in the valley of Hamon-gog.

And while they go through the land, if anyone sees a man's bone, he is to put up a sign by the place till those who are doing the work have put it in the earth in the valley of Hamon-gog.

And those passing by have passed through the land, and seen a bone of man, and one hath constructed near it a sign till those burying have buried it in the valley of the multitude of Gog.

And they shall go about passing through the land: and when they shall see the bone of a man, they shall set up sign by it, till the buriers bury it in the valley, of the multitude of Gog.

And the passers-by shall pass through the land, and when [any] seeth a man's bone, he shall set up a sign by it, till the buriers have buried it in the Valley of Hamon-Gog.