code: @Override
     protected int deleteValueData(String cid) throws SQLException, InvalidItemStateException, RepositoryException
     {
        if (deleteValue == null)
        {
           deleteValue = dbConnection.prepareStatement(DELETE_VALUE);
        }
        else
        {
           deleteValue.clearParameters();
        }
  
        deleteValue.setString(1, cid);
  
        return executeUpdate(deleteValue, TYPE_DELETE_VALUE);
     }
docs: {@inheritDoc}