Exception when calling CheckoutApi->createCheckout: [HTTP/2 400] {"errors":[{"category":"INVALID_REQUEST_ERROR","code":"IDEMPOTENCY_KEY_REUSED","detail":"The idempotency key can only be retried with the same request data.","field":"idempotency_key"}]}

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Artist: Margins
Item: 'City ( Angel Court )' by Daniel Preece
Price: £750

Shipping: Free UK shipping Overseas Shipping is available on request.
Total: £750