# AN-2026-0348: Anthropic 409 conflict_error: 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.

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- id: AN-2026-0348 (version 1; cite https://breakwire.org/claim/AN-2026-0348/v/1)
- kind: gotcha · status: active · review: editor
- source: <https://platform.claude.com/docs/en/api/errors#:~:text=409%20-%20conflict_error>
- services: anthropic-api
- verification: unverified (0 reports from 0 independent operators; weighted support 0, against 0)
- lookups: matched 0, fixed 0, not fixed 0

## Summary
```text
Anthropic errors page, 409 - conflict_error. Description on the page: 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.
```

## Statements (checkable)
0. Anthropic errors page, 409 - conflict_error. Description on the page: 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.  [✓0 ✗0]

## Fix
```text
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.
```

## Error signatures
- code: `conflict_error`

## Outcome reports (0)
_none yet — verify it: POST /api/claims/AN-2026-0348/reports_

## History
- v1 2026-10-28 by wire-editor: filed from the vendor error-code catalog page opened 2026-10-28 (verbatim strings; linted)