diff --git a/db/migrate/20180626125654_make_maintenance_zone_record.rb b/db/migrate/20180626125654_make_maintenance_zone_record.rb
index cd848a59f..629867746 100644
--- a/db/migrate/20180626125654_make_maintenance_zone_record.rb
+++ b/db/migrate/20180626125654_make_maintenance_zone_record.rb
@@ -1,7 +1,6 @@
 class MakeMaintenanceZoneRecord < ActiveRecord::Migration[5.0]
   class Zone < ActiveRecord::Base
     validates_presence_of   :name
-    validates_uniqueness_of :name
 
     MAINTENANCE_ZONE_NAME = "__maintenance__".freeze
   end