diff --git a/MailAlert.php b/MailAlert.php
index 9649003..06ce2fd 100644
--- a/MailAlert.php
+++ b/MailAlert.php
@@ -90,7 +90,7 @@ public static function customerHasNotification($id_customer, $id_product, $id_pr
         return count(Db::getInstance((bool) _PS_USE_SQL_SLAVE_)->executeS($sql));
     }
 
-    public static function deleteAlert($id_customer, $customer_email, $id_product, $id_product_attribute, $id_shop, $notification_sent)
+    public static function deleteAlert($id_customer, $customer_email, $id_product, $id_product_attribute, $id_shop = null, $notification_sent = true)
     {
         $sql = 'UPDATE `' . _DB_PREFIX_ . self::$definition['table'] . '` set `deleted` = 1, date_upd = NOW()' .
             ($notification_sent ? ', `notification_sent` = NOW()' : '') .
diff --git a/upgrade/upgrade-2.3.4.php b/upgrade/upgrade-2.4.1.php
similarity index 97%
rename from upgrade/upgrade-2.3.4.php
rename to upgrade/upgrade-2.4.1.php
index f043400..202dd28 100755
--- a/upgrade/upgrade-2.3.4.php
+++ b/upgrade/upgrade-2.4.1.php
@@ -23,7 +23,7 @@
  * @license   https://opensource.org/licenses/AFL-3.0 Academic Free License 3.0 (AFL-3.0)
  * International Registered Trademark & Property of PrestaShop SA
  */
-function upgrade_module_2_3_4()
+function upgrade_module_2_4_1()
 {
     $result = Db::getInstance()->execute('ALTER TABLE `' . _DB_PREFIX_ . 'mailalert_customer_oos` ADD `date_add` DATETIME NOT NULL, ADD `date_upd` DATETIME NOT NULL;');
     $result = $result && Db::getInstance()->execute('ALTER TABLE `' . _DB_PREFIX_ . 'mailalert_customer_oos` ADD `deleted` TINYINT NOT NULL DEFAULT 0, ADD `notification_sent` DATETIME NULL DEFAULT NULL, ADD INDEX (`deleted`)');