diff --git a/mod/lesson/db/upgrade.php b/mod/lesson/db/upgrade.php
index f4afd8c496e..63d88e73072 100644
--- a/mod/lesson/db/upgrade.php
+++ b/mod/lesson/db/upgrade.php
@@ -397,9 +397,11 @@ function xmldb_lesson_upgrade($oldversion) {
                   FROM {files} f
              LEFT JOIN {lesson_answers} la ON f.itemid = la.id
                  WHERE component = :component
+                   AND (filearea = :fileareaanswer OR filearea = :filearearesponse)
                    AND la.id IS NULL";
 
-        $orphanedfiles = $DB->get_recordset_sql($sql, array('component' => 'mod_lesson'));
+        $orphanedfiles = $DB->get_recordset_sql($sql, array('component' => 'mod_lesson', 'fileareaanswer' => 'page_answers',
+                'filearearesponse' => 'page_responses'));
         $fs = get_file_storage();
         foreach ($orphanedfiles as $file) {
             $fs->delete_area_files($file->contextid, $file->component, $file->filearea, $file->itemid);