From d156b2bde53283dd3fe108c767e7872199f48a7b Mon Sep 17 00:00:00 2001
From: Sander Roosendaal <roosendaalsander@gmail.com>
Date: Fri, 15 May 2020 17:25:02 +0200
Subject: [PATCH] bug fix

---
 rowers/dataprep.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/rowers/dataprep.py b/rowers/dataprep.py
index f568aab3..1aae86d9 100644
--- a/rowers/dataprep.py
+++ b/rowers/dataprep.py
@@ -484,7 +484,7 @@ def join_workouts(r,ids,title='Joined Workout',
         w = Workout.objects.get(id=id)
         w.duplicate  = False
         w.save()
-        if "duplicate" in message:
+        if message is not None and "duplicate" in message:
             message = ""
 
     return (id, message)