luos/workflow/engine/methods/tracker/tracker_Save.php

<?php
if(isset($_POST['form']))
    $sValue = $_POST['form'];   //For old processmap
else
    $sValue = $_POST;

unset($sValue['SAVE']);
if (!isset($sValue['CT_DERIVATION_HISTORY'])) {
  $sValue['CT_DERIVATION_HISTORY'] = 0;
}
if (!isset($sValue['CT_MESSAGE_HISTORY'])) {
  $sValue['CT_MESSAGE_HISTORY'] = 0;
}
require_once 'classes/model/CaseTracker.php';
$oCaseTracker = new CaseTracker();
$oCaseTracker->update($sValue);