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 move the fast elevator (fast1) from floor n3 to floor n4, which aligns with the goal of transporting passengers p2 and p3 from n4 to their respective destinations.

New State Description:
- fast0: At floor n0, 0/2 passengers.- fast1: At floor n4, 0/2 passengers.- 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 floor n4.- p3: On floor n4.- p4: On floor n1.- p5: On floor n3.

Action Chosen:
(move-up-fast fast1 n3 n4)
