Fatal error: Uncaught Exception: Error: Subquery returns more than 1 row<br />Error No: 1242<br />SELECT COUNT(DISTINCT p.product_id) AS total FROM oc_product_to_category p2c LEFT JOIN oc_product p ON (p2c.product_id = p.product_id) LEFT JOIN oc_product_description pd ON (p.product_id = pd.product_id) LEFT JOIN oc_product_to_store p2s ON (p.product_id = p2s.product_id) WHERE pd.language_id = '1' AND p.status = '1' AND p.date_available <= NOW() AND p2s.store_id = '0' AND p2c.category_id = '20' AND ((SELECT (CASE WHEN gpg.main_product_id = 0 OR gpg.main_product_id = p.product_id THEN 1 ELSE 0 END) AS result FROM oc_sppro_group_product_group_products gpgp LEFT JOIN oc_sppro_group_product_group gpg ON (gpg.product_group_id = gpgp.product_group_id) WHERE gpgp.product_id = p.product_id) = 1 OR NOT EXISTS (SELECT (CASE WHEN gpg.main_product_id = 0 OR gpg.main_product_id = p.product_id THEN 1 ELSE 0 END) AS result FROM oc_sppro_group_product_group_products gpgp LEFT JOIN oc_sppro_group_product_group gpg ON (gpg.product_group_id = in /home/virtwww/w_kram2019_11ee4b39/http/storage6/modification/system/library/db/mysqli.php on line 41