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 fast1 elevator up from floor n3 to n4. This aligns with the plan and allows us to pick up passenger p3, moving us closer to the goal state.

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

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