new_contents: from django.core.management.base import BaseCommand, CommandError
  from optparse import make_option
  from corehq.apps.domain.models import Domain
  from corehq.apps.sms.models import SMSLog
  
  class Command(BaseCommand):
      args = ""
      help = ("Sets a default value for all domains' "
          "send_to_duplicated_case_numbers property")
  
      def handle(self, *args, **options):
          for domain in Domain.get_all():
              count = SMSLog.count_by_domain(domain.name)
              if count > 0:
                  if not domain.send_to_duplicated_case_numbers:
                      # if not True, explicitly set to False
                      print "Setting %s to False" % domain.name
                      domain.send_to_duplicated_case_numbers = False
                      domain.save()
              else:
                  print "Setting %s to True" % domain.name
                  domain.send_to_duplicated_case_numbers = True
                  domain.save()
  
  
subject: Add management command for setting default value of send to dup number option