When a preferred child changes, the top part of a preferred path becomes detached from the bottom part (which becomes its own preferred path) and reattached to another preferred path (which becomes the new bottom part).
Kad se prioritetno dete promeni, gornji deo poželjne staze se 'otkači' od donjeg dela (koji postane zasebna poželjna staza) i prespaja se sa drugom poželjnom stazom (koji postaje novi donji deo).