"when a product variant is updated, it's possible that a new Variant ID is generated"

[sexybit]

Good day.

As we're getting, using the REST API, a number of errors stating that "the Variant IDs do not exist or do not belong to the product", a Shopify Partner support person has informed us that "Variant IDs in Shopify are not stable" and that "when a product variant is updated, it's possible that a new Variant ID is generated".

I would like to ask:

- whether someone can elaborate on that

- whether someone has experienced the same issue

- whether this is actually for real as it seems contrary to the basic principle of immutability of IDs

- whether this is documented anywhere in the docs

Thanks.