4xx Client Error
HTTP 409 Conflict
The request conflicts with the current state of the resource.
Check a URL's HTTP statusWhat 409 means
Common in APIs when creating a duplicate record or updating something that changed since it was read.
Common causes
- A duplicate unique value, such as an existing username.
- An edit conflict with a newer version.
How to fix it
- Fetch the latest version and retry.
- Choose a different unique value.
How to check a status code
Enter a URL in the HTTP Status Checker to see its status code, every redirect hop, and response time. For redirect-heavy pages, the Website Speed Test shows how much time redirects add.
FAQ
- What does HTTP 409 mean?
- 409 Conflict is a 4xx client error status code. The request conflicts with the current state of the resource.
- What causes a 409 error?
- A duplicate unique value, such as an existing username. An edit conflict with a newer version.
- How do I fix HTTP 409?
- Fetch the latest version and retry. Choose a different unique value.
Defined in RFC 9110.
Other 4xx client error codes
400 Bad Request401 Unauthorized403 Forbidden404 Not Found405 Method Not Allowed406 Not Acceptable408 Request Timeout410 Gone413 Content Too Large414 URI Too Long415 Unsupported Media Type418 I'm a teapot422 Unprocessable Content425 Too Early429 Too Many Requests431 Request Header Fields Too Large451 Unavailable For Legal Reasons