New error code added for MetafieldDefinitionUpdate
API
Effective October 01, 2023
As of API version 2023-10, we've added the METAOBJECT_DEFINITION_CHANGED error code to the MetafieldDefinitionUpdateUserErrorCode enum. This new error code is returned if you attempt to update a metaobject_reference metafield definition so that it references a different Metaobject definition. Previously, this action would result in an INTERNAL_SERVER_ERROR.
Learn more about METAOBJECT_DEFINITION_CHANGED on https://shopify.dev/docs/api/admin-graphql/2023-07/enums/MetafieldDefinitionUpdateUserErrorCode