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 board passenger p1 onto fast0 at floor n1, which aligns with the goal of moving passengers efficiently to their target floors.

New State Description:
- **fast0**: A fast elevator at floor 1 (n1), with 1 passenger (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**: On floor 1 (n1).- **p5**: On floor 3 (n3).

Action Chosen:
(board p1 fast0 n1 n0 n1)
