Each Shopping cart has its order order status. When you migrate from one shopping cart to another, you must decide what your order status will look like in the Target Store. With using MigrationPro you can map your order statuses before the migration process. To map order statuses, on the configuration page scroll down and you will see the order status mapping

Please feel free to contact our Support team if you're struggling with mapping order statuses. They will be more than happy to help you!