-- Drop the old table
DROP TABLE world_resources;

-- Recreate with simplified structure - no id, no scene_name, no object_name, only 2D coordinates
CREATE TABLE world_resources (
    item_id INTEGER NOT NULL,
    pos_x REAL NOT NULL,
    pos_y REAL NOT NULL,
    PRIMARY KEY (item_id, pos_x, pos_y)
) WITHOUT ROWID;

CREATE INDEX idx_world_resources_item_id ON world_resources(item_id);
CREATE INDEX idx_world_resources_position ON world_resources(pos_x, pos_y);