Migrate and improve subscriptions

subscription/models.py

@@ -53,7 +53,8 @@ class Subscription(models.Model):
         super(Subscription, self).save()
         from counter.models import Customer
         if not Customer.objects.filter(user=self.member).exists():
-            Customer(user=self.member, account_id=Customer.generate_account_id(self.id), amount=0).save()
+            last_id = Customer.objects.count() + 5195 # Number to keep a continuity with the old site
+            Customer(user=self.member, account_id=Customer.generate_account_id(last_id+1), amount=0).save()
         self.member.make_home()
 
     def get_absolute_url(self):