Wis. Stat. § 75.52: Judgment a bar, when.

No such action shall be commenced by any person under the provisions of this chapter after a judgment shall have been rendered against that person in any action founded on such tax deed commenced by that person or those under whom that person claims for the recovery of the possession of the lands described in such deed or any part thereof, nor after a judgment shall have been rendered against that person in an action brought by the former owner to recover possession of the lands described in such deed or any part thereof.