Wis. Stat. § 786.04
The court may require the guardian to convey the real estate which such individual adjudicated incompetent might or ought to have conveyed if still competent. Where such individual contracted before incompetency to convey real estate by warranty deed, the guardian shall convey by warranty deed subject to any exceptions set forth in the individual's contract to convey. The guardian shall not be personally liable because of any breach of such warranty, but such warranty deed shall have the same effect for all purposes as if the individual adjudicated incompetent had executed it at such time while competent. This section is applicable where an individual adjudicated incompetent before incompetency made an assignment of a contract to convey real estate but did not deed to the assignee the title to the premises covered by the contract.
Wis. Stat. § 786.04