Upsert doesn't work correctly.

When adding a product using upsert it creates the product correctly. But trying to ‚update‘ the product using the the same method doesn’t work, as I get an integrity constraint, saying the following;
 

SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry 'BU-10121' for key 'product.uniq.product.product_number__version_id'

I add products using the following code; 

$product = [
    'name' => (string) $product->name,
    'price' => [[
        'currencyId' => Defaults::CURRENCY,
        'gross' => 15,
        'net' => 10,
        'linked' => false
    ]],
    'manufacturer' => ['name' => 'Test'],
    'tax' => ['name' => '21%', 'taxRate' => 21],
    'stock' => (int) $product->qty,
    'id' => (string) $product->ean,
    'ean' => (string) $product->ean,
    'productNumber' => (string) $product->sku,
    'categories' => [
        ['Id' => 1, 'name' => (string) $product->type]
    ]
];

$this->productRepository->upsert([$product], Context::createDefaultContext());

How can i fix this?

I just had the same problem because I accidentally assigned a new random Uuid for upsert.

 'id' =\> Uuid::randomHex(),

Do you maybe have products with a different ean but with the same productNumber (sku)?

 

Also you should probably use a Uuid for your ID as it’s a BINARY(16) on database level. But I’m not sure about the side effects of using the ean as id.