diff --git a/app/but/jury_but.py b/app/but/jury_but.py
index 818809eb..f81dab4f 100644
--- a/app/but/jury_but.py
+++ b/app/but/jury_but.py
@@ -390,7 +390,7 @@ class DecisionsProposeesAnnee(DecisionsProposees):
                         self.formsemestre_pair,
                         ue_pair,
                     )
-                    ues_impair_sans_rcue.remove(ue_impair.id)
+                    ues_impair_sans_rcue.discard(ue_impair.id)
                     break
             if rcue is None:
                 raise ScoValueError(f"pas de RCUE pour l'UE {ue_pair.acronyme}")