Internal server error for update product variants mutation

I’m running a graphql query to set the fulfillment service of a shopify product variant to manual. I’m using the productVariantsBulkUpdate bulk mutation with a payload like.

{
  "productId": "gid://shopify/Product/**",
  "variants": [
    {
      "id": "gid://shopify/ProductVariant/**",
      "fulfillmentServiceId": "gid:/shopify/FulfillmentService/manual"
    }
  ]
}

However I’m getting an error which is an internal server error. This is only happening for 1 product by 1 user. It works for all other of the user’s products and for other users’ products(at least the ones we’ve tested and done ourselves)

Request ID: 6384b08f-1d98-4760-9e8f-9dd47e077208-1723814760