Attempt Number: 2
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 passenger p4 at floor n4, which aligns with the goal state where p4 should be on floor n4.

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)
