```ruby
class AddBatchNumberToPushes < ActiveRecord::Migration
  def change
    add_column :push_sent_emails, :batch_number, :integer
  end
end
```

Correct class name of migration
user
```ruby
class AddBatchNumberToPushSentEmails < ActiveRecord::Migration
  def change
    add_column :push_sent_emails, :batch_number, :integer
  end
end
```
assistant