---
description: Troubleshoot HTTP 409 error responses.
title: Error 409
image: https://developers.cloudflare.com/og-docs.png
---

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# Error 409

Last updated Aug 24, 2026|Copy as Markdown|[View as Markdown](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/support/troubleshooting/http-status-codes/4xx-client-error/error-409/index.md)|[Agent setup](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/agent-setup/)

## 409 Conflict

The `409 Conflict` status code indicates that the request could not be completed due to a conflict with the current state of the target resource.

For more details, refer to [RFC 7231 ↗](https://tools.ietf.org/html/rfc7231).

### Common use cases

This error typically happens with a `PUT` request when multiple clients are attempting to edit the same resource. To solve this issue:

* The server should generate a payload that includes enough information for the client to recognize the source of the conflict.
* Clients should retry the request again after resolving the conflict.

### Cloudflare-specific information

Cloudflare will return a 409 response for a [Error 1001: DNS Resolution Error](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/support/troubleshooting/http-status-codes/cloudflare-1xxx-errors/error-1001/).

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