How to specify product IDs in Google Search "application/ld+json" script without getting "Missing product ID (optional)" - seo

Question

How can I reduce warning of "Missing product ID (optional)" on "application/ld+json" script in google search console?
Below My sample JSON-LD code
<script type="application/ld+json">
{
"#context": "http://schema.org/",
"#type": "Product",
"name": "done product Name here",
"url": "done product url here",
"image": [
"done image url here"
],
"description": "done description here",
"sku": "H100000001",
"productID" : "9876543210", // Added like this type behaviour
"brand": {
"#type": "Thing",
"name": "cosmetics"
},
"offers": [{
"#type" : "Offer",
"sku": "H100000002",
"availability" : "http://schema.org/InStock",
"price" : "26.0",
"priceCurrency" : "USD",
"url" : "product url"
},
{
"#type" : "Offer",
"sku": "H100000003",
"availability" : "http://schema.org/InStock",
"price" : "26.0",
"priceCurrency" : "USD",
"url" : "product url"
},
{
"#type" : "Offer",
"sku": "H099020004",
"availability" : "http://schema.org/InStock",
"price" : "26.0",
"priceCurrency" : "USD",
"url" : "product url"
}]
}
</script>
I have tried different variables of product id below
1. "productID" : "9876543210",
2. "productID" : "isbn:9876543210",
3. "product-id" : "isbn:9876543210",
4. "product-id" : "9876543210",
but error still getting.
Can anyone help how can I solve the issue of Missing product ID (optional)" on Google Search Console?
Which behavior is correct for set product id in ld+json?

Answer 1

The message from Google is not very clear... what it's looking for is one of product IDs from https://schema.org/Product (gtin13, etc.). I was getting the same error after adding ProductID, but once I replaced ProductID with the gtinxxx values, the warning went away.