MDL-36957 backup: Allow invalid setting level in backup info file

diff --git a/backup/util/helper/backup_general_helper.class.php b/backup/util/helper/backup_general_helper.class.php
index b0425a3..fd0d674 100644 (file)
--- a/backup/util/helper/backup_general_helper.class.php
+++ b/backup/util/helper/backup_general_helper.class.php
@@ -221,8 +221,9 @@ abstract class backup_general_helper extends backup_helper {
                 case 'activity':
                     $info->activities[$setting['activity']]->settings[$setting['name']] = $setting['value'];
                     break;
-                default: // Shouldn't happen
-                    throw new backup_helper_exception('wrong_setting_level_moodle_backup_xml_file', $setting['level']);
+                default: // Shouldn't happen but tolerated for portability of customized backups.
+                    debugging("Unknown backup setting level: {$setting['level']}", DEBUG_DEVELOPER);
+                    break;
             }
         }