# 409 idempotency_key_reuse

**Idempotency key reused**

This idempotency key was already used with a different request.

- HTTP status: 409
- Problem identifier (`type` field): `https://developer.noryo.app/errors/idempotency_key_reuse`

[← Errors — Merchant API](https://developer.noryo.app/en-GB/errors)

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Canonical page: https://developer.noryo.app/en-GB/errors/idempotency_key_reuse