What does Deuteronomy 20:5 mean?

Then the officers will say to the troops, 'Is there anyone here who just built a new house but hasn’t moved in yet? Go home, or you might die in battle and someone else will get your house.' Deuteronomy 20:5 - Modern Text Bible

(Anyone who just built a house but hasn’t lived in it yet is allowed to go home, so they don’t miss out if they die.)