Merge branch 'MDL-77779-403' of https://github.com/ilyatregubov/moodle …

…into MOODLE_403_STABLE

backup/moodle2/restore_stepslib.php

@@ -3793,7 +3793,7 @@ public function process_course_module_competency($data) {
             // Sortorder is ignored by precaution, anyway we should walk through the records in the right order.
             $record = (object) $params;
             $record->ruleoutcome = $data->ruleoutcome;
-            $record->overridegrade = $data->overridegrade;
+            $record->overridegrade = $data->overridegrade ?? 0;
             $coursemodulecompetency = new \core_competency\course_module_competency(0, $record);
             $coursemodulecompetency->create();
         }