diff --git a/src/agenda_culturel/calendar.py b/src/agenda_culturel/calendar.py
index 99e094f..ad28967 100644
--- a/src/agenda_culturel/calendar.py
+++ b/src/agenda_culturel/calendar.py
@@ -234,7 +234,11 @@ class CalendarList:
                     | Q(recurrence_dtend__lt=startdatetime)
                 )
             )
-        ).filter(Q(other_versions__isnull=True)|~Q(other_versions__representative=F('pk'))).order_by("start_time").prefetch_related("exact_location").prefetch_related("category")
+        ).filter(
+            Q(other_versions__isnull=True) |
+            Q(other_versions__representative=F('pk')) |
+            Q(other_versions__representative__isnull=True)
+        ).order_by("start_time").prefetch_related("exact_location").prefetch_related("category").prefetch_related("other_versions")
 
         firstdate = datetime.fromordinal(self.c_firstdate.toordinal())
         if firstdate.tzinfo is None or firstdate.tzinfo.utcoffset(firstdate) is None: