Anthropic Claude API error
Anthropic API 409 conflict_error: what it means and how to fix it
409 conflict_errorRetry? YesLast verified 1 documented fix1 source
What it means
The request conflicts with the current state of a resource, for example the resource was modified concurrently, or a value that must be unique is already in use.
Causes
- Resource was modified concurrently
- A value that must be unique is already in use
How to fix it
- Fix 1.
Resolve the conflict, then retry the request.
More Anthropic API errors
All 13 Anthropic API errors400 invalid_request_errorRetry? Not stated400 invalid_request_error (spend limit reached)Retry? Not stated401 authentication_errorRetry? Not stated402 billing_errorRetry? Not stated403 permission_errorRetry? Not stated404 not_found_errorRetry? Not stated413 request_too_largeRetry? Not stated429 rate_limit_errorRetry? Yes
HTTP 409 at other providers
FAQ
What does the Anthropic API error "409 conflict_error" mean?
The request conflicts with the current state of a resource, for example the resource was modified concurrently, or a value that must be unique is already in use.
How do I fix Anthropic API "409 conflict_error"?
Resolve the conflict, then retry the request.
Should I retry Anthropic API "409 conflict_error"?
Yes. The official docs treat this error as retryable.
Which other AI APIs return HTTP 409?
Per their official error docs: Gemini API (409 already_exists; 409 aborted), OpenAI API (409 ConflictError).
Sources
Last verified against 1 source: Anthropic API's official docs and official SDK repositories.
- platform.claude.comhttps://platform.claude.com/docs/en/api/errors
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