need more help to edit products

I have under every product description some related products.
But how do I edit these, I would like to have them same number on all pages, or total removed.

Please help me :-)

assuming that you do not have a mod that shows related product.

when you edit a product, under tab links you can set related products, just adjust related products here or remove them

I use opencart 1.5.5.1
when I edit product page error

"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 "
PLZ hepl me
thanks alot of