---
title: "Delete Dataset Rows"
method: DELETE
path: "/felix/datasets/{name}/{version}/rows"
tags: ["felix", "datasets"]
---

# Delete Dataset Rows

`DELETE /felix/datasets/{name}/{version}/rows`

Delete specific rows from a dataset, creating a new version.

Supports two modes: index-based (``row_indices``) for backwards
compatibility and fingerprint-based (``fingerprints``) for safe
deletion that is immune to dataset mutations between analysis and
delete.

Args:
    name: Dataset name.
    version: Version number (use "latest" for most recent).
    request: Exactly one of ``row_indices`` or ``fingerprints``.

Returns:
    DatasetRowsDeleteResponse with deletion status and new version.

Raises:
    HTTPException: 400 if identifiers are invalid, 404 if not found.

## Path parameters

- `name` string, required
- `version` string, required

## Request body

- DatasetRowsDeleteRequest — Request to delete specific rows from a dataset. Exactly one of ``row_indices`` or ``fingerprints`` must be provided. Fingerprint-based deletion is preferred because it is immune to dataset mutations between analysis and delete.
  - `row_indices` integer[], nullable — Zero-based indices of rows to remove
  - `fingerprints` string[], nullable — Content fingerprints of rows to remove (position-independent)

## Response `200`

Successful Response

- DatasetRowsDeleteResponse — Response after deleting dataset rows.
  - `success` boolean
  - `dataset_name` string, required
  - `version` string, required
  - `rows_deleted` integer, required
  - `rows_remaining` integer, required
  - `new_version` string, nullable — New version number if a new version was created

## Other responses

- `422` — Validation Error

---

[API](https://skmtc.net/pioneer/apis/brain-api.md) · [All operations](https://skmtc.net/pioneer/apis/brain-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/pioneer/brain-api/versions/31dfe831e079/schema)