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 step is to change the robot's color to black so that it can paint tile_2-1 black, as required by the goal state.

New State Description:
- Robot1 is on tile_1-1 and is holding the color black.- Tile_0-4 is clear.- Tile_1-1 is occupied by robot1.- Tile_1-2 is clear.- Tile_1-3 is clear.- Tile_1-4 is clear.- Tile_1-5 is clear.- Tile_2-1 is clear.- Tile_2-2 is painted white and is no longer clear.- Tile_2-3 is painted black and is no longer clear.- Tile_2-4 is painted white and is no longer clear.- Tile_2-5 is painted black and is no longer clear.- Both colors, white and black, are available for switching.

Action Chosen:
change-color(robot1, white, black)
