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

Action Reasoning:
The next action in the plan is to leave p4 from fast1 at floor n4, which matches the depth requirement and helps move towards the goal state by freeing up space in the elevator.

New State Description:
- fast0: At floor n0, 0/2 passengers.- fast1: At floor n4, 1/2 passengers (p5 on board).- slow0-0: At floor n2, 0/1 passengers.- p0: On floor n2.- p1: On floor n1.- p2: On floor n5.- p3: On floor n5.- p4: On floor n4.- p5: On board fast1.- p6: On floor n2.

Action Chosen:
(leave p4 fast1 n4 n2 n1)
