Box 20 Code Z has been selected but no Section 199A income has been entered on Statement A

I see I'm not the first person to ask this question but I can't find an answer that seems to fit.

I have a K-1 from Sunoco LP. Box 20 Code Z = $-583. Box 20 Code AH = STMT.

The attached statement looks like this...

SunocoLP_K1_Supplement.png

I can't for the life of me figure out how to map these codes and amounts to the Section 199A worksheet..

Section 199A Worksheet.png

Any help would much appreciated.