# hook_exists

> This account or agent key already has a pre-trade hook.

Source: https://tickwire.io/docs/errors/hook_exists/

HTTP 409.

**Likely cause:** A second hook was created.

**What to do:** Update or delete the existing hook.

**Retry:** No. The same request gets the same answer; change something first.

Listed under [Pre-trade hooks, holds and kill switches](https://tickwire.io/docs/errors/#pre-trade-hooks-holds-and-kill-switches) in [Errors](https://tickwire.io/docs/errors/). Send the error's `requestId` to support and we can find the request.