diff --git a/htdocs/projet/card.php b/htdocs/projet/card.php
index 711d1b02935..db710e2715d 100644
--- a/htdocs/projet/card.php
+++ b/htdocs/projet/card.php
@@ -223,7 +223,7 @@ if (empty($reshook))
 			else
 			{
 				$db->rollback();
-
+				unset($_POST["ref"]);
 				$action = 'create';
 			}
 		}