diff --git a/app/but/jury_but_view.py b/app/but/jury_but_view.py
index 4cd6044f..f6437ad9 100644
--- a/app/but/jury_but_view.py
+++ b/app/but/jury_but_view.py
@@ -75,7 +75,12 @@ def show_etud(deca: DecisionsProposeesAnnee, read_only: bool = True) -> str:
     formsemestre_1 = deca.formsemestre_impair
     formsemestre_2 = deca.formsemestre_pair
     # Ordonne selon les dates des 2 semestres considérés (pour les redoublants à cheval):
-    if deca.formsemestre_pair.date_debut < deca.formsemestre_impair.date_debut:
+    reverse_semestre = (
+        deca.formsemestre_pair
+        and deca.formsemestre_impair
+        and deca.formsemestre_pair.date_debut < deca.formsemestre_impair.date_debut
+    )
+    if reverse_semestre:
         formsemestre_1, formsemestre_2 = formsemestre_2, formsemestre_1
     H.append(
         f"""
@@ -116,18 +121,21 @@ def show_etud(deca: DecisionsProposeesAnnee, read_only: bool = True) -> str:
             ),
         ]
         # Ordonne selon les dates des 2 semestres considérés:
-        if deca.formsemestre_pair.date_debut < deca.formsemestre_impair.date_debut:
+        if reverse_semestre:
             ues_ro[0], ues_ro[1] = ues_ro[1], ues_ro[0]
         # Colonnes d'UE:
         for ue, ue_read_only in ues_ro:
-            H.append(
-                _gen_but_niveau_ue(
-                    ue,
-                    deca.decisions_ues[ue.id],
-                    disabled=read_only or ue_read_only,
-                    annee_prec=ue_read_only,
+            if ue:
+                H.append(
+                    _gen_but_niveau_ue(
+                        ue,
+                        deca.decisions_ues[ue.id],
+                        disabled=read_only or ue_read_only,
+                        annee_prec=ue_read_only,
+                    )
                 )
-            )
+            else:
+                H.append("""<div class="niveau_vide"></div>""")
 
         # RCUE
         if dec_rcue is None: