diff --git a/app/models/formsemestre.py b/app/models/formsemestre.py
index eabf7f09..ecfc246c 100644
--- a/app/models/formsemestre.py
+++ b/app/models/formsemestre.py
@@ -606,7 +606,8 @@ class FormSemestre(db.Model):
                     [
                         inscr
                         for inscr in self.inscriptions
-                        if inscr.parcour.code == group.group_name
+                        if (inscr.parcour is not None)
+                        and inscr.parcour.code == group.group_name
                     ]
                 )
                 == 0