docs: public void doWrite(FieldTable table, KeyAreaInfo keyArea, BaseBuffer bufferNew) throws DBException
      {
          BaseBuffer bufferSeek = this.doSeek("==", table, keyArea);
          if (bufferSeek != null) // if (this.GetUniqueKeyCode() == DBConstants.UNIQUE) // Success means this one already exists
              throw new DBException(Constants.DUPLICATE_KEY);
          this.insertCurrent(table, keyArea, bufferNew, +1);  // Point to next HIGHER key
      }