@Transactional
    public void saveScanResultsForScan(ScanResult scanResult, Long scanId) {

        -----some---code----
       transientObject = create the object....
       apiScanRespository.save(transientObject);
       -----some-----code------

       apiScanRespository.getById(transientObject.getId()) -- this returns null

     apiScanRespository.findById(transientObject.getId()) -- this returns the object

    }