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 action in the given plan at depth 9 is to board p1 onto fast0 at floor 1. This aligns with the plan and takes us closer to the goal state by moving p1 towards its destination.

New State Description:
- **fast0**: A fast elevator at floor 1 (n1), with 2 passengers (p4 and p1) and a capacity of 2.- **fast1**: A fast elevator at floor 0 (n0), with 0 passengers and a capacity of 2.- **slow0-0**: A slow elevator at floor 1 (n1), with 0 passengers and a capacity of 1.- **slow1-0**: A slow elevator at floor 3 (n3), with 0 passengers and a capacity of 1.- **p0**: On floor 1 (n1).- **p1**: Onboard fast0 at floor 1 (n1).- **p2**: On floor 2 (n2).- **p3**: On floor 0 (n0).- **p4**: Onboard fast0 at floor 1 (n1).- **p5**: On floor 3 (n3).

Action Chosen:
(board p1 fast0 n1 n1 n2)
