diff --git a/db/migrate/20120427162634_move_migration_notifications_to_separate_category.rb b/db/migrate/20120427162634_move_migration_notifications_to_separate_category.rb
index 1b06594cd32..b00bcad0a0d 100644
--- a/db/migrate/20120427162634_move_migration_notifications_to_separate_category.rb
+++ b/db/migrate/20120427162634_move_migration_notifications_to_separate_category.rb
@@ -2,11 +2,13 @@ class MoveMigrationNotificationsToSeparateCategory < ActiveRecord::Migration
   tag :postdeploy
 
   def self.up
+    return unless Shard.current == Shard.default
     Notification.where(:name => ['Migration Export Ready', 'Migration Import Finished', 'Migration Import Failed']).
         update_all(:category => 'Migration')
   end
 
   def self.down
+    return unless Shard.current == Shard.default
     Notification.where(:name => ['Migration Export Ready', 'Migration Import Finished', 'Migration Import Failed']).
         update_all(:category => 'Other')
   end