EntityPropertyValue::update

protected function update()
{
	$result = new Result();

	$value = $this->property->getPreparedValueForSave($this);
	$res = $this->updateInternal($this->getId(), ['VALUE' => $value]);

	if ($res->isSuccess())
	{
		$result->setId($res->getId());
	}
	else
	{
		$result->addErrors($res->getErrors());
	}

	return $result;
}