Answered "Error removing dependent object" on aggregate-composite relationship

<?xml version="1.0" encoding="UTF-8"?>
<model package="myPackage" baseClass="xPDOObject" platform="mysql" defaultEngine="MyISAM" version="1.1">
    <object class="Categories" table="categories" extends="xPDOSimpleObject">
        <field key="parent_id" dbtype="int" precision="10" attributes="unsigned" phptype="integer" null="false" default="0" index="index" />
        <field key="sort_order" dbtype="int" precision="10" attributes="unsigned" phptype="integer" null="false" default="0" />

        <index alias="parent_id" name="parent_id" primary="false" unique="false" type="BTREE" >
            <column key="parent_id" length="" collation="A" null="false" />
        </index>

        <composite alias="Langs" class="CategoriesLang" local="id" foreign="cat_id" cardinality="many" owner="local" />
    </object>
    <object class="CategoriesLang" table="categories_lang" extends="xPDOObject">
        <field key="cat_id" dbtype="int" precision="10" attributes="unsigned" phptype="integer" null="false" index="index" />
        <field key="lang_id" dbtype="int" precision="10" attributes="unsigned" phptype="integer" null="false" index="index" />
        <field key="name" dbtype="varchar" precision="50" phptype="string" null="true" />
        <field key="description" dbtype="text" phptype="string" null="true" />

        <index alias="cat_id" name="cat_id" primary="false" unique="false" type="BTREE" >
            <column key="cat_id" length="" collation="A" null="false" />
        </index>
        <index alias="lang_id" name="lang_id" primary="false" unique="false" type="BTREE" >
            <column key="lang_id" length="" collation="A" null="false" />
        </index>

        <aggregate alias="Category" class="Categories" local="cat_id" foreign="id" cardinality="one" owner="foreign" />
        <aggregate alias="Langs" class="Langs" local="lang_id" foreign="id" cardinality="many" owner="foreign" />
    </object>
</model>

<?php
class myPackageCatalogCategoriesDeleteProcessor extends modObjectRemoveProcessor {

    public $primaryKeyField = 'id';
    public $classKey = 'Categories';

    /**
     * Log the removal manager action
     * @return void
     */
    public function logManagerAction() {

    }

}

return 'myPackageCatalogCategoriesDeleteProcessor ';

[2012-07-17 09:12:32] (ERROR @ /mysite/assets/components/mypackage/connector.php) Error removing dependent object: Array
(
    [cat_id] => 6
    [lang_id] => 1
    [name] => New Category
    [description] => 
)

[2012-07-17 09:12:32] (ERROR @ /mysite/assets/components/mypackage/connector.php) Error removing dependent object: Array
(
    [cat_id] => 6
    [lang_id] => 2
    [name] => Nouvelle Catégorie
    [description] => 
)