Attempt Number: 2
Error Message: Action not unique compared to other actions chosen from this state before. Choose a new action

Action Reasoning:
To bring us closer to the goal state, we need to first retrieve Car_2 from Curb_2 so Curb_2 becomes available for Car_2. Car_1 is currently clear and can move. We'll use Curb_0 as a temporary space for Car_1. This allows us to put Car_2 in its correct curb afterward.

New State Description:
- Curb_0: Car_1 is parked on it and is clear.- Curb_1: is clear and empty.- Curb_2: Car_3 is parked on it and is clear.- Curb_3: Car_0 is parked on it and is clear.- Car_0: is parked at curb_3 and clear.- Car_1: is parked at curb_0 and is clear.- Car_3: is parked at curb_2 and is clear.- Car_2: not present, retrieval needed.

Action Chosen:
(move-car-to-curb car1 car0 curb_0)
