> For the complete documentation index, see [llms.txt](/llms.txt).
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# Error: conflict (409)

The request conflicts with the current state of the resource. Wait for the resource to reach the expected state and retry.

The `conflict` error occurs when a request cannot be completed because the resource is in a state that conflicts with the requested operation.

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## Details

-   **HTTP Status:** `409 Conflict`
-   **Retryable:** Yes
-   **Task State:** FAILED

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## When does this occur?

This error is returned when:

-   You attempt to cancel a task that is still in the **pending** state (the task has not yet been claimed by a worker)

The operation can typically succeed once the resource transitions to the expected state.

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## Example response

```
{  "type": "/reference/api-and-sdk/troubleshooting/errors/conflict/",  "title": "Pending agent runs cannot be cancelled, retry after a moment.",  "status": 409,  "instance": "/api/v1/agent/tasks/abc123/cancel",  "error": "Pending agent runs cannot be cancelled, retry after a moment.",  "retryable": true}
```

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## How to resolve

1.  Wait a moment for the resource to transition to the expected state.
2.  Retry the request.

For task cancellation specifically, wait until the task moves from **pending** to **in progress** before attempting to cancel.

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## Related

-   [Managing Cloud Agents](/agent-platform/cloud-agents/managing-cloud-agents/) — Viewing and managing agent tasks
-   [Oz API & SDK](/reference/api-and-sdk/) — API reference for managing agent tasks