Group by sharer ID too, hopefully this time it's enough

src/Vervis/Ticket.hs

@@ -64,7 +64,7 @@ getTicketSummaries mfilt morder jid = do
             on $ p ^. PersonIdent ==. s ^. SharerId
             on $ t ^. TicketCreator ==. p ^. PersonId
             where_ $ t  ^. TicketProject ==. val jid
-            groupBy $ t ^. TicketId
+            groupBy (t ^. TicketId, s ^. SharerId)
             for_ mfilt $ \ filt -> where_ $ filt t
             for_ morder $ \ order -> orderBy $ order t
             return