--- title: InventoryTransferDuplicateUserErrorCode - GraphQL Admin description: >- Possible error codes that can be returned by `InventoryTransferDuplicateUserError`. api_version: unstable api_name: admin source_url: html: >- https://shopify.dev/docs/api/admin-graphql/unstable/enums/InventoryTransferDuplicateUserErrorCode md: >- https://shopify.dev/docs/api/admin-graphql/unstable/enums/InventoryTransferDuplicateUserErrorCode.md --- # Inventory​Transfer​Duplicate​User​Error​Code enum Possible error codes that can be returned by `InventoryTransferDuplicateUserError`. ## Valid values * IDEMPOTENCY\_​CONCURRENT\_​REQUEST This request is currently inprogress, please try again. * IDEMPOTENCY\_​KEY\_​PARAMETER\_​MISMATCH The same idempotency key cannot be used with different operation parameters. * TRANSFER\_​NOT\_​FOUND The transfer was not found. *** ## Fields * [Inventory​Transfer​Duplicate​User​Error.code](https://shopify.dev/docs/api/admin-graphql/unstable/objects/InventoryTransferDuplicateUserError#field-InventoryTransferDuplicateUserError.fields.code) OBJECT An error that occurs during the execution of `InventoryTransferDuplicate`. *** ## Map ### Fields with this enum * [Inventory​Transfer​Duplicate​User​Error.code](https://shopify.dev/docs/api/admin-graphql/unstable/objects/InventoryTransferDuplicateUserError#field-InventoryTransferDuplicateUserError.fields.code)