[PrestaShopDatabaseException]

You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ' , 16),(13961, ...' at line 6<br /><br /><pre>INSERT INTO `ps_st_search_price_index` (id_product, id_currency, id_shop, price_min, price_max, id_country) VALUES (13961, 2, 5, , , 16),(13961, 2, 5, , , 37) ON DUPLICATE KEY UPDATE id_product = id_product</pre>
at line 769 in file classes/db/Db.php

764.         if ($webservice_call && $errno) {
765.             $dbg = debug_backtrace();
766.             WebserviceRequest::getInstance()->setError(500, '[SQL Error] ' . $this->getMsgError() . '. From ' . (isset($dbg[3]['class']) ? $dbg[3]['class'] : '') . '->' . $dbg[3]['function'] . '() Query was : ' . $sql, 97);
767.         } elseif (_PS_DEBUG_SQL_ && $errno && !defined('PS_INSTALLATION_IN_PROGRESS')) {
768.             if ($sql) {
769.                 throw new PrestaShopDatabaseException($this->getMsgError() . '<br /><br /><pre>' . $sql . '</pre>');
770.             }
771. 
772.             throw new PrestaShopDatabaseException($this->getMsgError());
773.         }
774.     }