diff --git a/src/agenda_culturel/views.py b/src/agenda_culturel/views.py
index 30b73ca..b0c1206 100644
--- a/src/agenda_culturel/views.py
+++ b/src/agenda_culturel/views.py
@@ -2065,6 +2065,7 @@ def fix_duplicate(request, pk):
                     event.set_no_modification_date_changed()
                     event.save()
                     edup.save()
+                    edup.events = [e for e in edup.events if e.pk != event.pk]
                     messages.success(
                         request,
                         _(