Form 6781override line 8 and 9?

[jg31]

In part one of form for section 1256 contracts no boxes apply (a, b c or d) The infrmation on the summary entries are not population in lines 8 and 9 for st and lt gains. Also here is an error showing on line 6 (with a zero value). Is it necessary to "override" line 8 and 9 values or is something else happening I can check? Thank you