Guys, Please ignore my previous message.
I have received an email from SA immigration that skills assessment can be expired but that should be positive. (DIBP gave me incorrect information stating that skill assessment have to be positive and valid (Not expired), may be both SA gov and DIBP have to sync on this). Taking email as written proof, I consider this information is correct.
This what I got from SA Immi
-Have a GSM skills assessment for an occupation on the current South Australian State Occupation List or South Australian Graduate List.Applicants can apply for “Special Conditions Apply” occupations. Immigration SA and DIBP will accept all GSM positive result Skills Assessments regardless of any validity period indicated.