# Update a product version

Update an existing version of a product. Only unpublished versions can be modified.

## Request[​](#request "Direct link to request")

## Responses[​](#responses "Direct link to Responses")

* 204
* 400
* 401
* 409
* 422

There is no content to send for this request, but the headers may be useful.

The server could not understand the request due to invalid syntax.

401 Unauthorized

409 Conflict

Client error