MySQL query error on "INSERT WHERE NOT EXISTS"

Question

Can someone tell me, why the first query executes fine, but the second query gives as error. It even gives error with empty table

#1060 - Duplicate column name '3'.

FIRST QUERY - OK

INSERT INTO `ps_category_product` (`id_category`, 
                                   `id_product`, 
                                   `position`
                                   ) 
SELECT * FROM (SELECT '3','41895','2') AS tmp 
WHERE NOT EXISTS ( SELECT * FROM `ps_category_product` 
                            WHERE id_category =3 AND id_product =41895);

SECOND QUERY - ERROR

INSERT INTO `ps_category_product` (`id_category`, 
                                   `id_product`, 
                                   `position`
                                   ) 
SELECT * FROM (SELECT '3','116059','3') AS tmp 
WHERE NOT EXISTS ( SELECT * FROM `ps_category_product` 
                            WHERE id_category =3 AND id_product =116059
                 );