In this case, I would suggest you provide additional assessment yourself, setting its weight to the maximum value. That will both give the author a correct grade for their submission (code) and the reviewers will get low grade for the assessment (which is expected because they did not review it correctly).
Workshop
Overriding grade of submission and assessment
Αυτή η συζήτηση κλειδώθηκε κι έτσι δεν μπορείτε να απαντήσετε σε αυτή.