with line 460 in red.

if (isTokenCompletedDatestamped($thissurvey))
449 {
450 $token->completed = $today;
451 } else {
452 $token->completed = 'Y';
453 }
454 if(isset($token->participant_id))
455 {
456 $slquery = SurveyLink::model()->find('participant_id = :pid AND survey_id = :sid AND token_id = :tid', array(':pid'=> $token->participant_id, ':sid'=>$surveyid, ':tid'=>$token->tid));
457
458 if (isTokenCompletedDatestamped($thissurvey))
459 {
460 $slquery->date_completed = $today;
461 } else {
462 // Update the survey_links table if necessary, to protect anonymity, use the date_created field date
463 $slquery->date_completed = $slquery->date_created;
464 }
465 $slquery->save();
466 }
467 }
468 $token->usesleft--;
469 }
470 $token->save();
471
472 if ($quotaexit==false)