---
title: "Breaking change to metafieldDefinitionUpdate mutation: access input type changed - Shopify developer changelog"
description: Shopify’s developer changelog documents all changes to Shopify’s platform. Find the latest news and learn about new platform opportunities.
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  html: https://shopify.dev/changelog/breaking-change-to-metafielddefinitionupdate-mutation-access-input-type-changed
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---

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October 1, 2023

Tags:

* Action Required
* API
* 2023-10

# Breaking change to metafieldDefinitionUpdate mutation: access input type changed

**Note:** This change does not affect many apps and you likely aren't affected unless you are defining a variable of type `MetafieldAccessInput` for the access property in your `MetafieldDefinitionUpdate` mutation.

As of GraphQL Admin API version 2023-10, we are changing the input field type of `MetafieldDefinitionUpdateInput.access` from `MetafieldAccessInput` to `MetafieldAccessUpdateInput`. This change is part of a broader API change to introduce support for explicit access grants (see [Introducing explicit access grants for app-owned metafields](https://shopify.dev/changelog/introducing-explicit-access-grants-for-app-owned-metafields) for details), which will have a different input for updating the grants on existing definitions than for specifying grants on new definitions.