diff --git a/migrations/004_add_custom_texts.php b/migrations/004_add_custom_texts.php
index 4e8ed95..1aee746 100644
--- a/migrations/004_add_custom_texts.php
+++ b/migrations/004_add_custom_texts.php
@@ -60,13 +60,13 @@ public function down()
         LEFT JOIN `config_values` USING (`field`)
         LEFT JOIN `i18n`
           ON `table` = 'config'
-              AND `field` = 'value'
+              AND `i18n`.`field` = 'value'
               AND `object_id` = MD5(`config`.`field`)
-        WHERE `field` IN (
+        WHERE `config`.`field` IN (
              'KITOOLBOX_TEXT_ESSENTIAL',
              'KITOOLBOX_TEXT_RULES_FOR_TOOLS_TEMPLATE',
              'KITOOLBOX_TEXT_LANDING_PAGE_STUDENT',
-             'KITOOLBOX_TEXT_LANDING_PAGE_TEACHER',
+             'KITOOLBOX_TEXT_LANDING_PAGE_TEACHER'
         )";
         DBManager::get()->exec($query);