Geting Deleted NumberSequences

Override the form datasource delete method write .logic in that method it will also workfor table delete method also.

public void delete()
{
 NumberSequenceTable numSeqTable;
 ProjOnAccTransId    ProjOnAccTransId;

  ProjOnAccTransId   = ProjOnAccTrans.TransId;
 numSeqTable        = NumberSequenceTable::find(projparameters::numRefProjTransIdBase().NumberSequenceId);

 super();

if (numSeqTable.Continuous)
    {
        numSeqTable = NumberSequenceTable::find(projparameters::numRefProjTransIdBase().NumberSequenceId);
        NumberSeq::release(numSeqTable.NumberSequence, ProjOnAccTransId);
    }
    else
    {
        if (NumberSeq::numInsertFormat(numSeqTable.NextRec - 1, numSeqTable.Format) == ProjOnAccTransId)
        {
            ttsbegin;
            numSeqTable = NumberSequenceTable::find(projparameters::numRefProjTransIdBase().NumberSequenceId, true);
            numSeqTable.NextRec--;
            numSeqTable.doUpdate();
            ttscommit;
        }
    }
}

Unsaved Record also regenerated by overriding the form method close and call the datasource  delete method

public void close()
{
    if( ProjOnAccTrans.TransId && !ProjOnAccTrans.recid)
     ProjOnAccTrans_ds.delete();
    super();
}