Attempt Number: 4
Error Message: Action not unique compared to other actions chosen from this state before. Choose a new action

Action Reasoning:
Passenger p4, already on fast1 at floor 1, needs to be moved to floor 3. Moving directly minimizes additional boarding and travel steps.

New State Description:
- fast0: Fast elevator at floor 1 (n1), 0/2 passengers, empty.- fast1: Fast elevator at floor 3 (n3), 1/2 passengers, has passenger p4.- slow0-0: Slow elevator at floor 1 (n1), 0/1 passengers, empty.- slow1-0: Slow elevator at floor 3 (n3), 0/1 passengers, empty.- p0: On floor 1 (n1).- p1: On floor 3 (n3).- p2: On floor 2 (n2).- p3: On floor 0 (n0).- p4: On fast1 at floor 3 (n3).- p5: On floor 2 (n2).

Action Chosen:
move-up-fast(fast1, n1, n3)
