Availability status of many occupations has changed over the weekend in SA occupation list. Apart from that, a lot of occupations have now got the additional conditions i.e. not available for chain migration, not available for high point migration, etc.
Please check the status of the occupation on the website before you apply for the nomination.
You can check the latest status of the occupation here: https://www.migration.sa.gov.au/skilled-migrants/lists-of-state-nominated-occupations