diff --git a/trytond/wizard/wizard.py b/trytond/wizard/wizard.py
index bb6d401c20..53ef987e98 100644
--- a/trytond/wizard/wizard.py
+++ b/trytond/wizard/wizard.py
@@ -262,7 +262,7 @@ class Wizard(URLMixin, PoolBase):
             if model:
                 ids = context.get('active_ids') or []
                 id_ = context.get('active_id')
-                if id_ not in ids:
+                if id_ not in ids and id_ is not None:
                     ids.append(id_)
                 # Check read access
                 Model.read(ids, ['id'])