if (CModule::IncludeModule("crm")){
  $oldOwnerTypeID = 1;
  $oldOwnerID = 5229;
  $newOwnerTypeID = 2;
  $newOwnerID = 3196;
  
  \Bitrix\Crm\Timeline\Entity\TimelineBindingTable::attach(
    $oldOwnerTypeID,
    $oldOwnerID,
      $newOwnerTypeID,
    $newOwnerID,
    array(\Bitrix\Crm\Timeline\TimelineType::ACTIVITY)
  );
  
  \Bitrix\Crm\Timeline\Entity\TimelineBindingTable::detach(
    $newOwnerTypeID,
    $newOwnerID,
    $oldOwnerTypeID,
    $oldOwnerID,
    array(\Bitrix\Crm\Timeline\TimelineType::ACTIVITY)
  );
  
  CCrmActivity::ChangeOwner($oldOwnerTypeID, $oldOwnerID, $newOwnerTypeID, $newOwnerID);
}