diff --git a/rowers/dataprep.py b/rowers/dataprep.py
index 175f98b9..5324bcd6 100644
--- a/rowers/dataprep.py
+++ b/rowers/dataprep.py
@@ -327,7 +327,8 @@ def workout_summary_to_df(
         enddate=timezone.now()+timezone.timedelta(days=1)):
 
     ws = Workout.objects.filter(
-        user=rower,date__gte=startdate,date__lte=enddate
+        user=rower,date__gte=startdate,date__lte=enddate,
+        duplicate=False
         ).order_by("startdatetime")
 
     types = []