[PrestaShopDatabaseException]

Expression #5 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'ipeklife_ipeklife.a.id_attribute' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

SELECT ag.`id_attribute_group`, ag.`is_color_group`, agl.`name` AS group_name, agl.`public_name` AS public_group_name,
					a.`id_attribute`, al.`name` AS attribute_name, a.`color` AS attribute_color, product_attribute_shop.`id_product_attribute`,
					IFNULL(stock.quantity, 0) as quantity, product_attribute_shop.`price`, product_attribute_shop.`ecotax`, product_attribute_shop.`weight`,
					product_attribute_shop.`default_on`, pa.`reference`, product_attribute_shop.`unit_price_impact`,
					product_attribute_shop.`minimal_quantity`, product_attribute_shop.`available_date`, ag.`group_type`
				FROM `ps_product_attribute` pa
				 INNER JOIN ps_product_attribute_shop product_attribute_shop
		ON (product_attribute_shop.id_product_attribute = pa.id_product_attribute AND product_attribute_shop.id_shop = 1)
				 LEFT 
			JOIN ps_stock_available stock
			ON (stock.id_product = pa.id_product AND stock.id_product_attribute = IFNULL(`pa`.id_product_attribute, 0) AND stock.id_shop = 1  )
				LEFT JOIN `ps_product_attribute_combination` pac ON (pac.`id_product_attribute` = pa.`id_product_attribute`)
				LEFT JOIN `ps_attribute` a ON (a.`id_attribute` = pac.`id_attribute`)
				LEFT JOIN `ps_attribute_group` ag ON (ag.`id_attribute_group` = a.`id_attribute_group`)
				LEFT JOIN `ps_attribute_lang` al ON (a.`id_attribute` = al.`id_attribute`)
				LEFT JOIN `ps_attribute_group_lang` agl ON (ag.`id_attribute_group` = agl.`id_attribute_group`)
				 INNER JOIN ps_attribute_shop attribute_shop
		ON (attribute_shop.id_attribute = a.id_attribute AND attribute_shop.id_shop = 1)
				WHERE pa.`id_product` = 139
					AND al.`id_lang` = 2
					AND agl.`id_lang` = 2
				GROUP BY id_attribute_group, id_product_attribute
				ORDER BY ag.`position` ASC, a.`position` ASC, agl.`name` ASC

at line 613 in file classes/db/Db.php

607. 			WebserviceRequest::getInstance()->setError(500, '[SQL Error] '.$this->getMsgError().'. From '.(isset($dbg[3]['class']) ? $dbg[3]['class'] : '').'->'.$dbg[3]['function'].'() Query was : '.$sql, 97);
608. 		}
609. 		else if (_PS_DEBUG_SQL_ && $errno && !defined('PS_INSTALLATION_IN_PROGRESS'))
610. 		{
611. 			if ($sql)
612. 				throw new PrestaShopDatabaseException($this->getMsgError().'<br /><br /><pre>'.$sql.'</pre>');
613. 			throw new PrestaShopDatabaseException($this->getMsgError());
614. 		}
615. 	}
616. 
617. 	/**