ALTER TABLE "qcp5_recommendations" 
DROP CONSTRAINT IF EXISTS "qcp5_recommendations_qcp5_product_id_fkey";

ALTER TABLE "qcp5_recommendations"
ADD CONSTRAINT "qcp5_recommendations_qcp5_product_id_fkey"
FOREIGN KEY ("qcp5_product_id")
REFERENCES "qcp5_products" ("id")
ON DELETE SET NULL;
