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 board passenger p2 onto fast1. This aligns with the goal of moving passengers to their destination floors efficiently.

New State Description:
- fast0: At floor n0, 0/2 passengers.- fast1: At floor n4, 2/2 passengers (p3 and p2 on board).- slow0-0: At floor n0, 0/1 passengers.- slow1-0: At floor n3, 0/1 passengers.- p0: On floor n0.- p1: On floor n1.- p2: On board fast1.- p3: On board fast1.- p4: On floor n1.- p5: On floor n3.

Action Chosen:
(board p2 fast1 n4 n1 n2)
