diff --git a/application/models/Participant.php b/application/models/Participant.php
index 84f8e6f4812..3ff70b1316a 100755
--- a/application/models/Participant.php
+++ b/application/models/Participant.php
@@ -1113,7 +1113,9 @@ public function deleteParticipantTokenAnswer($sParticipantsIDs)
                         if (!empty($tokenAndId['participant_id']) && $surveyTableExists) {
                             /** @var Token $token */
                             $token = Token::model($aSurveyID)->find('participant_id = :pid', [':pid' => $tokenAndId['participant_id']]);
-                            $token->delete();
+                            if (!is_null($token)) {
+                                $token->delete();
+                            }
                         }
                         $iDeletedParticipants = $this->deleteParticipants($sParticipantsIDs, false);
                     }