@@ -0,0 +1,6 @@
+class AddStripeIdToSubscriptions < ActiveRecord::Migration
+  def change
+    add_column :subscriptions, :stripe_id, :string
+    add_index :subscriptions, :stripe_id
+  end
+end
After we update our keys (`StripeSubscriptions#update_local_stripe_references`), we'll be able to nullify this column.