You should try this one
add_adjacent_zone( "start_zone", "hall_zone", "enter_hall_zone" );
add_adjacent_zone( "hall_zone", "dinning_zone", "enter_dinning_zone" );
add_adjacent_zone( "hall_zone", "hallway_zone", "enter_hallway_zone" );
add_adjacent_zone( "hall_zone", "living_room_zone", "enter_living_room_zone" );
add_adjacent_zone( "dinning_zone", "kitchen_zone", "enter_kitchen_zone" );
add_adjacent_zone( "kitchen_zone", "hallway_zone2", "enter_hallway_zone2" );
add_adjacent_zone( "hallway_zone2", "study_zone", "enter_study_zone" );
(https://i.imgur.com/XeYql5u.png)
and rename the hallway_zone on the top by hallway_zone2 with the right kvp zone/door in Radiant.