State tax was withheld on a 1099-Misc (box 16), but box 18 is empty. It’s causing an error. Should I manually complete box 18?

I live in Wisconsin but did some contract work in Minnesota. I got a 1099-Misc for $800. They withheld $16 in box 16, but left box 18 blank. Minnesota form M1W gives me an error when I do the review because the MN income is blank. If I override it and put in $800, I get an error relating to e-filing. Should I just put $800 in box 18 of the 1099 even though the employer left it blank?