---
title: "Unlinks a custom field definition from the specified project."
method: POST
path: "/projects/{projectId}/unlinkcustomfielddefinition"
tags: ["customFields"]
---

# Unlinks a custom field definition from the specified project.

`POST /projects/{projectId}/unlinkcustomfielddefinition`

When the definition is unlinked from a project, all values of the custom field will be removed from the tasks within that project.
            
            <Check title="Required Permissions" icon="key">The user must have `project-master-data:write` permissions or `write` permissions on the specified project.</Check>

## Path parameters

- `projectId` string, uuid, required

## Headers

- `Authorization` string, required

## Request body

- UnlinkCustomFieldDefinitionForm — Represents a form for unlinking a custom field definition.
  - `customFieldDefinitionId` string, uuid, required — The id of the custom field definition.

## Response `204`

No Content

- object

## Other responses

- `400` — Bad Request
- `401` — Unauthorized
- `404` — Not Found

---

[API](https://skmtc.net/awork-io/apis/api-v1-reference.md) · [All operations](https://skmtc.net/awork-io/apis/api-v1-reference/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/awork-io/api-v1-reference/versions/f784a53f60df/schema)