Index: /mods/wpsg_mod_kundenverwaltung.class.php
===================================================================
--- /mods/wpsg_mod_kundenverwaltung.class.php	(revision 8398)
+++ /mods/wpsg_mod_kundenverwaltung.class.php	(revision 8403)
@@ -497,4 +497,8 @@
 							
 							$_SESSION['wpsg']['errorFields'][] = 'email';
+							
+							unset($_SESSION['wpsg']['checkout']['email']);
+							unset($_SESSION['wpsg']['checkout']['email2']);
+							unset($_SESSION['wpsg']['checkout']['id']);
 							
 							$error = true;