# Delete a product line

`DELETE /accounting/products/{id}/product-lines/{productLineId}`

Group: Accounting › Products › Product Lines · Operation ID: `deleteAccountingProductLine`

Hard-deletes one product line, cascading to its pricing (headers, entries, rate cards). `id` and `productLineId` must resolve to an existing product line under that product or the call fails with NOT_FOUND.

A `Prepaid` line and its paired `Usage` line must be deleted together — deleting one without the other fails the call (enforced by the underlying domain action, not this endpoint). The call runs in a transaction: a failure deletes nothing.

[Open in the interactive reference](https://docs.api.lensing.ai/?op=deleteAccountingProductLine)

## Parameters

| Name | In | Type | Required | Description |
| --- | --- | --- | --- | --- |
| `Api-Version` | header | `"v1"` | yes | The API version this request targets, named by its public identifier. Required on every request; omitting it, or naming a version this company does not have, is answered with 400. This document describes version `v1`. |
| `Idempotency-Key` | header | string | no | An opaque caller-chosen string (1-255 characters) that makes this request safe to retry. Repeating the same key with an identical request body replays the original response instead of re-executing - but only once that original request succeeded; a failed attempt re-executes on retry. Repeating the key with a different body is answered with 422. A key still in flight is answered with 409 - as is a key whose original request was interrupted before it finished, for a few minutes afterwards, until that attempt is presumed dead. A completed response stays replayable for 24 hours. The key is scoped to the caller, not to the action: reusing it for a different action is answered with 409 or 422 rather than treated independently. On read actions this header is ignored. On write actions that cannot offer the guarantee it is answered with `400 IDEMPOTENCY_NOT_SUPPORTED` rather than silently ignored. |
| `id` | path | string | yes | Id of the product the line belongs to (a UUID); bound from the :id path segment. |
| `productLineId` | path | string | yes | Id of the product line to delete (a UUID); bound from the :productLineId path segment. |

## Response

`200` Success

## Response headers

- `Idempotency-Replayed` — Present and `true` only when this response replays a previously stored one for the same Idempotency-Key, rather than reflecting a live execution. Absent on a live response - never sent as `false`.

## Errors

| Code | Status |
| --- | --- |
| `INVALID_ID` | 400 |
| `NOT_FOUND` | 400 |
| `VALIDATION_FAILED` | 400 |
| `IDEMPOTENCY_KEY_CONFLICT` | 409 |
| `IDEMPOTENCY_PAYLOAD_MISMATCH` | 422 |

## Statuses

- `400` — Invalid request or business failure. Codes: INVALID_ID, NOT_FOUND, VALIDATION_FAILED
- `401` — Missing or invalid access token
- `403` — Not authorized
- `404` — Not found
- `409` — The Idempotency-Key is still being processed by another request.
- `422` — The Idempotency-Key was already used with a different request payload.
- `429` — Too many requests
- `500` — Internal server error