fixed RQ issue - bg tasks now working on linux notebook

rowers/braintreestuff.py

@@ -171,9 +171,17 @@ def update_subscription(rower,data,method='up'):
             )
 
         if rower.paidplan != 'coach':
-            coachees = Rower.objects.filter(coach__in=[rower]).distinct()
-            for coachee in coachees:
-                coachee.coaches.remove(rower)
+            try:
+                coachgroup = coach.mycoachgroup
+            except CoachingGroup.DoesNotExist:
+                coachgroup = CoachingGroup()
+                coachgroup.save()
+                rower.mycoachgroup = coachgroup
+                rower.save()
+                
+            athletes = Rower.objects.filter(coachinggroups__in=[rower.mycoachgroup]).distinct()
+            for athlete in athletes:
+                athlete.coachinggroups.remove(rower.mycoachgroup)
 
         if method == 'up':
             transactions = result.subscription.transactions