diff --git a/htdocs/public/eventorganization/attendee_new.php b/htdocs/public/eventorganization/attendee_new.php
index d3099bbc36bee..fa7613e14dbc1 100644
--- a/htdocs/public/eventorganization/attendee_new.php
+++ b/htdocs/public/eventorganization/attendee_new.php
@@ -1,7 +1,7 @@
 <?php
 /* Copyright (C) 2021		Dorian Vabre			<dorian.vabre@gmail.com>
  * Copyright (C) 2023		Laurent Destailleur		<eldy@users.sourceforge.net>
- * Copyright (C) 2024		MDW							<mdeweerd@users.noreply.github.com>
+ * Copyright (C) 2024-2025	MDW							<mdeweerd@users.noreply.github.com>
  * Copyright (C) 2024       Frédéric France             <frederic.france@free.fr>
  *
  * This program is free software; you can redistribute it and/or modify
@@ -362,7 +362,7 @@ function llxFooterVierge()
 
 		// If the registration has already been paid for this attendee
 		if (!empty($confattendee->date_subscription) && !empty($confattendee->amount)) {
-			$securekeyurl = dol_hash(getDolGlobalString('EVENTORGANIZATION_SECUREKEY') . 'conferenceorbooth'.$id, 'master');
+			$securekeyurl = dol_hash(getDolGlobalString('EVENTORGANIZATION_SECUREKEY') . 'conferenceorbooth'.$id, 'md5');
 			$redirection = $dolibarr_main_url_root.'/public/eventorganization/subscriptionok.php?id='.((int) $id).'&securekey='.urlencode($securekeyurl);
 
 			$mesg = $langs->trans("RegistrationAndPaymentWereAlreadyRecorded", $email);