# Experiment Custom Section \[UPDATE]

```
PUT 
/experiment_custom_sections/:id
```

**Required Permissions**: `ExperimentCustomSection Update` or `ExperimentCustomSection Admin`

> **caution**
>
> Only fields provided in the request will be updated. Fields not included in the request body will retain their existing values.
>
> Note that when updating experiment fields within custom sections (e.g., through the Experiments endpoint), all existing custom section field values will be DELETED and replaced with only those provided in the request.

## Request

## Responses

* 200
* 400
* 401
* 403
* 404

OK

Bad Request

Unauthorized

Forbidden

Experiment Custom Section not found