Attempt Number: 2
Error Message: Action not unique compared to other actions chosen from this state before. Choose a new action

Action Reasoning:
Fast0 has p4 on board at floor 1 (n1), and needs to move to floor 3 (n3) to drop off p4. This will bring us closer to the goal without violating any constraints.

New State Description:
- fast0: Fast elevator at floor 3 (n3), 1/2 passengers, with p4 on board.- fast1: Fast elevator at floor 2 (n2), 0/2 passengers, available.- slow0-0: Slow elevator at floor 1 (n1), 0/1 passengers, available.- slow1-0: Slow elevator at floor 3 (n3), 0/1 passengers, available.- p0: On floor 1 (n1), not on any elevator.- p1: On floor 3 (n3), not on any elevator.- p2: On floor 2 (n2), not on any elevator.- p3: On floor 4 (n4), not on any elevator.- p4: On fast0 at floor 3 (n3).- p5: On floor 2 (n2), not on any elevator.

Action Chosen:
move-up-fast(fast0, n1, n3)
