Attempt Number: 3
Error Message: Action not unique compared to other actions chosen from this state before. Choose a new action

Action Reasoning:
Moving car_2 from behind car_3 to curb_0 will free car_3 and position car_2 in its rightful position according to the goal state.

New State Description:
- Curb_0: car_2 is parked and clear.- Curb_1: car_0 is parked and clear.- Curb_2: car_1 is parked and clear.- Curb_3: car_3 is parked and clear.car_0: Parked in curb_1, clear.car_1: Parked in curb_2, clear.car_2: Parked in curb_0, clear.car_3: Parked in curb_3, clear.

Action Chosen:
(move-car-to-curb car_2 car_3 curb_0)
