diff --git a/app/views/users.py b/app/views/users.py
index 43d347d7d..7b8d98813 100644
--- a/app/views/users.py
+++ b/app/views/users.py
@@ -531,12 +531,12 @@ def create_user_form(user_name=None, edit=0, all_roles=True):
             user_name = vals["user_name"]
         # ce login existe ?
         err_msg = None
-        existing_user = User.query.filter_by(user_name=user_name).count() > 0
-        if (
-            edit and not existing_user
+        nb_existing_user = User.query.filter_by(user_name=user_name).count() > 0
+        if edit and (
+            nb_existing_user == 0
         ):  # safety net, le user_name ne devrait pas changer
             err_msg = f"identifiant {user_name} inexistant"
-        if not edit and not existing_user:
+        if not edit and nb_existing_user > 0:
             err_msg = f"identifiant {user_name} déjà utilisé"
         if err_msg:
             H.append(tf_error_message(f"""Erreur: {err_msg}"""))
diff --git a/sco_version.py b/sco_version.py
index bc55b7eba..60ae7efa1 100644
--- a/sco_version.py
+++ b/sco_version.py
@@ -1,7 +1,7 @@
 # -*- mode: python -*-
 # -*- coding: utf-8 -*-
 
-SCOVERSION = "9.3.29"
+SCOVERSION = "9.3.30"
 
 SCONAME = "ScoDoc"