Why is only one Mock object created?

Question

PHP

The situation is this. For testing, you need several Mock objects of the same class.
We create a method:

protected function createBagMock(
        ?delivery $delivery = null,
        ?string $barcode = null,
        ?int $weight = null,
        array $products =[]
    ): Bag {
        $bag = $this->getMockBuilder(Bag::class)
            ->setConstructorArgs([
                'pickUpDelivery' => is_null($delivery) ? $this->dliveryMock() : $delivery,
                'barcode' => is_null($barcode) ? TestValues::TEST_BARCODE : $barcode,
                'weight' => is_null($weight) ? 1000 : $weight,
                'products' => empty($products) ? [] : $products,
            ])->getMock();

        return $bag;
    }

We call:

dump($this->createBagMock()); //тут Mock_Bag_edb40126
dump($this->createBagMock()); //и тут Mock_Bag_edb40126
dump($this->createBagMock()); //и тут тоже Mock_Bag_edb40126

In all cases, the same object was returned to us, and I would have three different ones. It seems that on the first call, the object was created, and on subsequent calls, the previously created mock-object is returned. How can I get multiple mock objects of the same class?