我使用opencart 1.5.5.1编辑产品时，我在下面收到此错误，我无法编辑产品
"Warning: mysql_query(): Unable to save result set in /home/tabpcmar/domains/tabpcmarket.ir/public_html/system/database/mysql.php on line 22Notice: Error: Subquery returns more than 1 row
Error No: 1242
SELECT DISTINCT *, (SELECT GROUP_CONCAT(cd1.name ORDER BY level SEPARATOR ' > ')
FROM oc_category_path cp LEFT JOIN oc_category_description cd1 ON (cp.path_id =
cd1.category_id AND cp.category_id != cp.path_id) WHERE cp.category_id = c.category_id
AND cd1.language_id = '2' GROUP BY cp.category_id) AS path, (SELECT keyword FROM
oc_url_alias WHERE query = 'category_id=63') AS keyword FROM oc_category c LEFT JOIN
oc_category_description cd2 ON (c.category_id = cd2.category_id) WHERE c.category_id
= '63' AND cd2.language_id = '2' in
/home/tabpcmar/domains/tabpcmarket.ir/public_html/system/database/mysql.php on line 50 "