Alter an Entity of another package to make it unique

Hello,

I am working on a package for my company eCommerce website which will be based on ConcreteCMS and CommunityStore.

I have to make this ConcreteCMS interacting with a Prestashop ERP (I know it is not an ideal stack), and I have to add per-warehouse stock on the website to display some ship delays.

I actually have an Entity ProductInventory that looks like this:

<?php

namespace Concrete\Package\CommunityStoreSi3bRabbitmq\Entities;

// Workaround https://grafikart.fr/forum/29227
use Doctrine\Mapping\{Entity, Table, Id, GeneratedValue, Column, ManyToOne, JoinColumn};

use Concrete\Core\Support\Facade\DatabaseORM as dbORM;
use Concrete\Package\CommunityStore\Src\CommunityStore\Product\Product;

/**
 * @Entity
 * @Table(name="CommunityStoreSi3bProductInventory")
 */
class ProductInventory
{
    /**
     * @Id
     * @GeneratedValue
     * @Column
     */
    private ?int $id = null;

    /**
     * @Column(type="text")
     */
    private string $barcode;

    /**
     * @Column
     */
    private ?int $quantity = null;

    /**
     * @ManyToOne(inversedBy = "productInventories")
     * @JoinColumn(nullable = false)
     */
    private ?Warehouse $warehouse = null;

    /**
     * @ManyToOne(targetEntity = "Concrete\Package\CommunityStore\Src\CommunityStore\Product\Product", inversedBy = "productInventories")
     * @JoinColumn(name = "barcode", referencedColumnName = "pBarcode", nullable = false)
     */
    private Product $product;

The issue I have is with this $product property. Unluckily, Product::pBarcode is not marked as unique, therefore I cannot define it as a foreign key. I would like to know if I can add the UNIQUE property to this column ideally without having to fork CommunityStore. In my context, it is very relevant to define barcode as unique.

Might be worth engaging via issue here: