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

Action Reasoning:
The next valid action according to the plan is to leave passenger p3 from fast1 at floor n0, which aligns with the provided sequence.

New State Description:
- fast0: At floor n0, 0/2 passengers.- fast1: At floor n0, 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 n2.- p3: On floor n0.- p4: On floor n1.- p5: On floor n3.

Action Chosen:
(leave p3 fast1 n0 n1 n0)
