What is alternative to fulfillmentServiceId in 2024-04?

Topic summary

A developer is seeking guidance on updating the default fulfillment service for product variants in Shopify’s API version 2025-01.

Previous approach (2024-04):

  • Used the fulfillmentServiceId field via productVariantUpdate mutation
  • This field has been deprecated or removed in newer API versions

Current issue:

  • The old method no longer works in version 2025-01
  • No alternative solution has been identified yet

Status: The question remains unanswered, with the developer looking for the current best practice or replacement API method to achieve the same functionality.

Summarized with AI on November 2. AI used: claude-sonnet-4-5-20250929.

How to change default fulfillment service of product variant? Previously, in version 2024-04, it was possible to change the fulfillmentServiceId field via productVariantUpdate, but this is no longer possible. How is this done on the latest version 2025-01?