Minn. Stat. § 573.11

If all the persons liable for the payment of any such debt shall not be included as defendants, the action shall not thereby be dismissed or barred; but the court may order any other parties brought in, and allow such amendments as may be necessary, on such terms as it may prescribe. If more than one person is liable, and the creditor shall bring action against all or any of them, and those liable shall dispute the debt, or the amount claimed, the court may order an issue to be framed, and direct the amount to be ascertained by a jury, and shall determine how much each is liable to pay.