Attempt Number: 5
Error Message: Action not unique compared to other actions chosen from this state before. Choose a new action

Action Reasoning:
Since robot1 is on tile_1-1 and holding black, we should paint the tile below (tile_2-1), ensuring we follow the goal of painting with the correct color at tile_2-1. This establishes progress towards our goal state without violation.

New State Description:
Tile tile_0-1 is clear. Tile tile_0-2 is clear. Tile tile_0-3 is clear. Tile tile_1-1 is occupied by robot1. Tile tile_1-2 is clear. Tile tile_1-3 is clear. Tile tile_2-1 is painted black. Tile tile_2-2 is painted white. Tile tile_2-3 is painted black. Robot1 is on tile_1-1, holding color black. Colors white and black are available for switching.

Action Chosen:
paint-down(robot1, tile_2-1, tile_1-1, black)
