diff --git a/app/models/ues.py b/app/models/ues.py
index 33f825c4..d88cc7e6 100644
--- a/app/models/ues.py
+++ b/app/models/ues.py
@@ -432,6 +432,7 @@ class UniteEns(models.ScoDocModel):
                 self.niveau_competence, parcours
             )
             if not ok:
+                self.formation.invalidate_cached_sems()
                 self.niveau_competence = prev_niveau  # restore
                 return False, error_message