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 move the fast elevator fast1 down to floor n2. This will allow passenger p2 to reach their destination floor n2.

New State Description:
- fast0: At floor n0, 0/2 passengers.- fast1: At floor n2, 2/2 passengers (p2 and p3 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:
(move-down-fast fast1 n4 n2)
