How to update an object in MODX?

Question

MODX

Let me explain.
The package created in CMPGenerator, new objects are created perfectly, but the existing ones do not want to be updated.
Here is the code for the snippet that should update an existing entry in the database:

<?php

$modx->addPackage('profut', $modx->getOption('core_path').'components/profut/model/');

$user = $modx->getUser();
$pfUser = $modx->getObject('ProfutUsers', array('uid' => $user->get('id')));
$pfUserArray = array();

if ($pfUser) { // true
    echo "update ";
    $pfUserArray = $pfUser->toArray();
}
else {
    echo "create ";
    $pfUser = $modx->newObject('ProfutUsers');
    $pfUserArray['uid'] = $user->get('id');
    $pfUserArray['team_id'] = 0;
    $pfUserArray['role'] = 0;
}

echo $pfUser->get('way_id') . ' '; // 1
// ((int) $hook->getValue('casetype')) == 2
$pfUserArray['way_id'] = ((int) $hook->getValue('casetype'));

$pfUser->fromArray($pfUserArray);
echo $pfUser->get('way_id') . ' '; // 2

$pfUser->save();
echo $pfUser->get('way_id') . ' '; // 2

$pfUser = $modx->getObject('ProfutUsers', array('uid' => $user->get('id')));
echo $pfUser->get('way_id') . ' '; // 1

die();

and this is what I see:
update 1 2 2 1
What am I doing wrong!? :/
Maybe I don't understand something? ^^