What does Joshua 20:9 mean?

These were the appointed cities for all the children of Israel, and for the stranger that sojourneth among them, that whosoever killeth any person unwittingly might flee thither, and not die by the hand of the avenger of blood, until he stood before the congregation.

These were the cities appointed for all the children of Israel, and for the stranger that sojourneth among them, that whosoever killeth any person at unawares might flee thither, and not die by the hand of the avenger of blood, until he stood before the congregation.

These were the appointed cities for all the children of Israel, and for the stranger that sojourneth among them, that whosoever killeth any person unwittingly might flee thither, and not die by the hand of the avenger of blood, until he stood before the congregation.

These were the towns marked out for all the children of Israel and for the man from a strange country living among them, so that anyone causing the death of another in error, might go in flight there, and not be put to death by him who has the right of punishment for blood till he had come before the meeting of the people.

These have been cities of meeting for all the sons of Israel, and for a sojourner who is sojourning in their midst, for the fleeing thither of any one smiting life inadvertently, and he doth not die by the hand of the redeemer of blood till his standing before the company.

These cities were appointed for all the children of Israel, and for the strangers, that dwelt among them, that whosoever had killed a person unawares might flee to them, and not die by the hand of the kinsman, coveting to revenge the blood that was shed, until he should stand before the people to lay open his cause.

These were the cities appointed for all the children of Israel, and for the stranger that sojourneth among them, that whosoever smiteth any one mortally without intent might flee thither, and not die by the hand of the avenger of blood, until he stood before the assembly.