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 plan is to board p2 onto fast1 at floor n4, as fast1 is currently at floor n4 with available capacity.

New State Description:
- **fast0**: A fast elevator currently at floor 0 (n0), with 0 passengers and a capacity of 2.- **fast1**: A fast elevator at floor 4 (n4), now with 1 passenger (p2) 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**: On floor 1 (n1).- **p2**: On elevator fast1.- **p3**: On floor 4 (n4).- **p4**: On floor 1 (n1).- **p5**: On floor 3 (n3).

Action Chosen:
(board p2 fast1 n4 n0 n1)
