Falta el campo 'itemReviewed' en 'Fragmentos de reseñas' de Search Console

[Messagenes]

Buenas tardes,

En Search Console me notifica en 'Fragmentos de reseñas' que falta el campo itemReviewed. Aquí os muestro el código. ¿Sabéis qué puede ser?:

<script type="application/ld+json">

{
"@context": "http://schema.org/",
"@type": "Product",
"gtin13":"*************",
"name":"Product_name_1",
"review": [{"@type": "Review", 
			"itemReviewed": [{"@type" : "Product",
							  "name" : "Product_name_1"}],
							  "reviewRating": [{"@type": "Rating","ratingValue": "5","bestRating": "5"}],
							  "author": [{"@type": "Person","name": "person_name_1"}]},
		   {"@type": "Review",
		    "itemReviewed": [{"@type" : "Product",
		    				  "name" : "Product_name_1"}],
		    				  "reviewRating": [{"@type": "Rating","ratingValue": "4","bestRating": "5"}],
		    				  "author": [{"@type": "Person","name": "person_name_2"}]},
		   {"@type": "Review",
		    "itemReviewed": [{"@type" : "Product",
		    				  "name" : "Product_name_1"}],
							  "reviewRating": [{"@type": "Rating","ratingValue": "4","bestRating": "5"}],
							  "author": [{"@type": "Person","name": "Person_name_3"}]}],
"aggregateRating": [{"@type": "AggregateRating",
					"itemReviewed": [{"@type": "Product", "name": "person_name_1"}],
					"ratingValue": "4.3",
					"reviewCount": "3"}],
"url":"https:\/\/shop.messagenes.com\/products\/follow-us-on-instagram-sticker",
"image": ["https:\/\/cdn.shopify.com\/s\/files\/1\/0343\/0540\/9160\/products\/instagram-nfc-qr_0ef15de8-6991-408e-a84c-6476ddd22402_638x.png?v=1611559622"],
"description":"Descripción blablabla",
"sku":"*********",
"brand":{"@type": "Thing", "name":"Store_name"},
"offers": [{"@type" : "Offer","sku":"*********","availability" : "http://schema.org/InStock", "price" :7.2, "priceCurrency" :"EUR","priceValidUntil": "2021-02-05","url" :"https:\/\/shop.messagenes.com\/products\/follow-us-on-instagram-sticker?variant=37898968334511"}]
}
</script>

[Messagenes]

Error: 

itemreviewed