What does Joshua 20:6 mean?

And he shall dwell in that city, until he stand before the congregation for judgment, until the death of the high priest that shall be in those days: then shall the manslayer return, and come unto his own city, and unto his own house, unto the city from whence he fled.

And he shall dwell in that city, until he stand before the congregation for judgment, and until the death of the high priest that shall be in those days: then shall the slayer return, and come unto his own city, and unto his own house, unto the city from whence he fled.

And he shall dwell in that city, until he stand before the congregation for judgment, until the death of the high priest that shall be in those days: then shall the manslayer return, and come unto his own city, and unto his own house, unto the city from whence he fled.

And he is to go on living in that town till he has to come before the meeting of the people to be judged; (till the death of him who is high priest at that time:) then the taker of life may come back to his town and to his house, to the town from which he had gone in flight.

and he hath dwelt in that city till his standing before the company for judgment, till the death of the chief priest who is in those days--then doth the man-slayer turn back and hath come unto his city, and unto his house, unto the city whence he fled.'

And he shall dwell in that city, till he stand before judgment to give an account of his fact, and till the death of the high priest, who shall be at that time: then shall the manslayer return, and go into his own city and house from whence he fled.

And he shall dwell in that city, until he have stood before the assembly in judgment, until the death of the high-priest that shall be in those days; then shall the slayer return, and come unto his own city, and unto his own house, unto the city from whence he fled.