# Activate flow version

`POST` `/api/v1/crm-connections/{crm_connection_id}/flows/{flow_id}/versions/{version_id}/activate`

Sets this version as the active version of the flow. The previously active
version (if any) becomes Obsolete. Returns 204 on success. If the version
is already Active, returns 204 without making changes.

## Path parameters

| Name | Type | Required | Description |
|------|------|----------|-------------|
| crm_connection_id | string | yes | UUID of the CRM connection |
| flow_id | string | yes | DurableId of the flow definition |
| version_id | string | yes | DurableId of the flow version, as returned in the durable_id field of list_flow_versions |

## Response

`204 No Content` — `application/json`

_No response body._

## Errors

| Status | Description |
|--------|-------------|
| 400 | Bad Request |
| 403 | Forbidden |
| 404 | Not Found |
| 422 | Unprocessable Entity |
| 502 | Bad Gateway |