fixing session clone

rowers/views/planviews.py

@@ -306,6 +306,8 @@ def plannedsession_multiclone_view(
                 ps.enddate += delta
                 if ps.enddate > lastdate:
                     lastdate = ps.enddate
+				if ps.fitfile:
+					ps.fitfile = None
                 ps.save()
                 for rower in rowers:
                     add_rower_session(rower,ps)
@@ -1552,6 +1554,9 @@ def plannedsession_clone_view(request,id=0,userid=0):
     ps.enddate = enddate
     ps.preferreddate = ps.startdate+deltadays
 
+	if ps.fitfile:
+		ps.fitfile = None
+
 
     ps.save()