One of the most common types of malpractice claims that people file against attorneys is failure to inform of Statute of Limitations deadlines. Not filing an action timely can result in the client losing their case. This can result in a malpractice claim being filed against the attorney. Having malpractice insurance is a great way to protect your firm from the liability of a case like this.
https://www.lawyers.com/legal-info/criminal/criminal-law-basics/wisconsin-criminal-statutes-of-limitations.html#:~:text=In%20Wisconsin%2C%20the%20general%20statute,for%20felonies%20is%20six%20years.