diff --git a/fetchmail_thread_default/models/fetchmail_server.py b/fetchmail_thread_default/models/fetchmail_server.py
index 8763fc7fc7..6e002b723c 100644
--- a/fetchmail_thread_default/models/fetchmail_server.py
+++ b/fetchmail_thread_default/models/fetchmail_server.py
@@ -27,7 +27,7 @@ def _get_thread_models(self):
         ]).mapped("model_id")
         # Exclude AbstractModel
         return [(m.model, m.name) for m in models
-                if getattr(self.env[m.model], "_auto")]
+                if m.model in self.env and getattr(self.env[m.model], "_auto")]
 
     # TODO New api on v10+
     # pylint: disable=old-api7-method-defined