diff --git a/db/migrate/20130801155107_rename_staff_action_pk.rb b/db/migrate/20130801155107_rename_staff_action_pk.rb
deleted file mode 100644
index 8631731b3..000000000
--- a/db/migrate/20130801155107_rename_staff_action_pk.rb
+++ /dev/null
@@ -1,9 +0,0 @@
-class RenameStaffActionPk < ActiveRecord::Migration
-  def up
-    execute "ALTER INDEX admin_logs_pkey RENAME TO staff_action_logs_pkey"
-  end
-
-  def down
-    execute "ALTER INDEX staff_action_logs_pkey RENAME TO admin_logs_pkey"
-  end
-end
diff --git a/db/migrate/20130910220317_rename_staff_action_logs_to_user_history.rb b/db/migrate/20130910220317_rename_staff_action_logs_to_user_history.rb
index 781613310..e5163dd1e 100644
--- a/db/migrate/20130910220317_rename_staff_action_logs_to_user_history.rb
+++ b/db/migrate/20130910220317_rename_staff_action_logs_to_user_history.rb
@@ -3,7 +3,6 @@ class RenameStaffActionLogsToUserHistory < ActiveRecord::Migration
     remove_index :staff_action_logs, [:staff_user_id, :id]
     rename_table :staff_action_logs, :user_histories
     rename_column :user_histories, :staff_user_id, :acting_user_id
-    execute "ALTER INDEX staff_action_logs_pkey RENAME TO user_histories_pkey"
     add_index :user_histories, [:acting_user_id, :action, :id]
   end
 
@@ -11,7 +10,6 @@ class RenameStaffActionLogsToUserHistory < ActiveRecord::Migration
     remove_index :user_histories, [:acting_user_id, :action, :id]
     rename_table :user_histories, :staff_action_logs
     rename_column :staff_action_logs, :acting_user_id, :staff_user_id
-    execute "ALTER INDEX user_histories_pkey RENAME TO staff_action_logs_pkey"
     add_index :staff_action_logs, [:staff_user_id, :id]
   end
 end