Entering K-1 box 20 code z information

I have a Schedule K-1 (Form 1065) with the following entries in box 20:

A  ……3,200

Z …….*STMT

When I look at the attached Statement A, there is an entry for Section 1231 Gain (Loss), but no entry for Section 199A Dividends. So I enter this info in TurboTax for box 20

When TurboTax runs its final check, it tells me there is an error because “Box 20 Code Z has been selected but no income has been entered on Statement A”.  I get this same error if the amount if leave blank or if I insert 0.

What am I missing?