Field Mapping issue Sf 4.2

composer.json

{
    "name": "meshenka/test-sf4",
    "type": "project",
    "license": "proprietary",
    "description": "A test project with Symfony4",
    "require": {
        "php": "^7.1.3",
        "ext-ctype": "*",
        "ext-iconv": "*",
        "symfony/dotenv": "*",
        "doctrine/doctrine-fixtures-bundle": "^3.0",
        "doctrine/doctrine-migrations-bundle": "^2.0",
        "sensio/framework-extra-bundle": "^5.1",
        "symfony/console": "*",
        "symfony/flex": "^1.1",
        "symfony/form": "^4.0",
        "symfony/framework-bundle": "*",
        "symfony/orm-pack": "^1.0",
        "symfony/security-csrf": "^4.0",
        "symfony/twig-bundle": "^4.0",
        "symfony/validator": "^4.0",
        "symfony/yaml": "*"
    },
    "require-dev": {
        "phpspec/phpspec": "^5.1",
        "sensiolabs/security-checker": "^4.1",
        "symfony/debug-bundle": "^4.0",
        "symfony/debug-pack": "^1.0",
        "symfony/maker-bundle": "^1.11",
        "symfony/phpunit-bridge": "^4.0",
        "symfony/profiler-pack": "^1.0",
        "symfony/web-server-bundle": "^4.0",
        "symfony/webpack-encore-pack": "^1.0"
    },
    "config": {
        "preferred-install": {
            "*": "dist"
        },
        "sort-packages": true,
        "bin-dir": "bin"
    },
    "autoload": {
        "psr-4": {
            "App\\": "src/"
        },
        "psr-0": {"": "src"}
    },
    "autoload-dev": {
        "psr-4": {
            "App\\Tests\\": "tests/"
        }
    },
    "replace": {
        "symfony/polyfill-apcu": "*",
        "symfony/polyfill-php70": "*",
        "symfony/polyfill-php56": "*"
    },
    "scripts": {
        "auto-scripts": {
            "cache:clear": "symfony-cmd",
            "assets:install --symlink --relative %PUBLIC_DIR%": "symfony-cmd",
            "security-checker security:check": "script"
        },
        "post-install-cmd": [
            "@auto-scripts"
        ],
        "post-update-cmd": [
            "@auto-scripts"
        ]
    },
    "conflict": {
        "symfony/symfony": "*"
    },
    "extra": {
        "symfony": {
            "id": "01C16NRNSRB9Z0474E39P63C0R",
            "allow-contrib": false
        }
    }
}

console output

bin/console doctrine:mapping:info

 Found 1 mapped entities:

 [OK]   App\Store\Entity\ProductEntity

bin/console doctrine:schema:create --dump-sql

 The following SQL statements will be executed:

bin/console doctrine:schema:validate

Mapping
-------

 [OK] The mapping files are correct.

Database
--------

 [OK] The database schema is in sync with the mapping files.

bin/console --version
Symfony 4.2.2 (env: dev, debug: true)


#pleaz help ma!! >__<

doctrine.yaml

parameters:
    # Adds a fallback DATABASE_URL if the env var is not set.
    # This allows you to run cache:warmup even if your
    # environment variables are not available yet.
    # You should not need to change this value.
    env(DATABASE_URL): ''

doctrine:
    dbal:
        # configure these for your database server
        driver: 'pdo_mysql'
        server_version: '5.7'
        charset: utf8mb4

        # With Symfony 3.3, remove the `resolve:` prefix
        url: '%env(resolve:DATABASE_URL)%'
    orm:
        auto_generate_proxy_classes: '%kernel.debug%'
        naming_strategy: doctrine.orm.naming_strategy.underscore
        auto_mapping: true
        mappings:
            App\Store:
                is_bundle: false
                type: xml
                dir: '%kernel.project_dir%/src/Resources/config/doctrine'
                prefix: 'App\Store\Entity'
                alias: Store

Product.php

namespace App\Domain\Model;

abstract class Product implements ProductInterface {

    /**
     * @var int
     */
    protected $id;

    /**
     * @var string
     */
    protected $name;

    /**
     * @var float
     */
    protected $price;

    /**
     * @var string
     */
    protected $description;

    /**
     * getName
     *
     * @return string
     */
    public function getName() : string 
    {
        return $this->name;
    }

    public function getId() : int 
    {
        return $this->id;
    }
    // all accessors
}

ProductEntity.orm.xml

<?xml version="1.0" encoding="UTF-8"?>
<doctrine-mapping xmlns="http://doctrine-project.org/schemas/orm/doctrine-mapping" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://doctrine-project.org/schemas/orm/doctrine-mapping
                          https://www.doctrine-project.org/schemas/orm/doctrine-mapping.xsd">

    <entity name="App\Store\Entity\ProductEntity" 
        table="product" 
        schema="schema_name" 
        repository-class="App\Store\Repository\ProductRepository" 
        read-only="false">
        <id name="id" 
            type="integer">
            <generator strategy="AUTO" />
        </id>

        <indexes>
            <index name="name_index" 
                columns="name"/>
        </indexes>

        <field name="name" 
            type="string" 
            length="50" 
            column="name"/>
        <field name="price" 
            type="decimal" 
            precision="2" 
            scale="7">
            <options>
                <option name="comment">Price in Euro</option>
                <option name="default">0.0</option>
            </options>
        </field>
        <field name="description" 
            type="text" 
            length="50" 
            nullable="true"/>
        <field name="slug" 
            type="string" 
            length="255"
            nullable="false">
            <options>
                <option name="comment">slug is used to generate url to the product page</option>
            </options>
        </field>
    </entity>
</doctrine-mapping>

ProductEntity.php

namespace App\Store\Entity;

use App\Domain\Model\Product;

class ProductEntity extends Product
{

    protected $slug;

    /**
     * Get the value of slug
     */ 
    public function getSlug(): string
    {
        return $this->slug;
    }

    /**
     * Set the value of slug
     *
     * @return  self
     */ 
    public function setSlug($slug)
    {
        $this->slug = $slug;

        return $this;
    }
}