> ## Documentation Index
> Fetch the complete documentation index at: https://docs.aurous-labs.com/llms.txt
> Use this file to discover all available pages before exploring further.

# chat_cancel_target_already_terminal

> The chat completion has already finished and can't be cancelled.

**Code**: `chat_cancel_target_already_terminal`
**HTTP status**: `409`
**Type**: `invalid_request`

## When it fires

`POST /v1/chat/completions/{id}/cancel` was called on a completion whose status is already terminal — `completed`, `failed`, or any `cancelled_*` flavour. Treat as an idempotency hint: a normal completion arrived before your cancel signal did. Not a bug.

## How to recover

Read `GET /v1/chat/completions/{id}` for the final-state record (with its `usage` block and `credits_charged`). If you raced the completion, the partial-or-full charge has already been committed against your balance.