diff --git a/app/but/jury_but.py b/app/but/jury_but.py
index 9997a736..913297cc 100644
--- a/app/but/jury_but.py
+++ b/app/but/jury_but.py
@@ -364,9 +364,8 @@ class DecisionsProposeesAnnee(DecisionsProposees):
             )
         # Si l'un des semestres est extérieur, propose ADM
         if (
-            self.formsemestre_impair.modalite == "EXT"
-            or self.formsemestre_pair.modalite == "EXT"
-        ):
+            self.formsemestre_impair and self.formsemestre_impair.modalite == "EXT"
+        ) or (self.formsemestre_pair and self.formsemestre_pair.modalite == "EXT"):
             self.codes.insert(0, sco_codes.ADM)
 
         #