# Delete a workflow version
<a name="workflows-version-delete"></a>

You can delete a user-defined workflow version using the console, CLI, or one of the SDKs. Deleting a workflow version doesn't affect any ongoing runs that are using the workflow version.

You can't delete the [Default workflow version](workflows-default-version.md). You delete all the user-defined versions, then delete the workflow.

**Topics**
+ [Delete a workflow version using the console](#workflow-versions-console-delete)
+ [Delete a workflow version using the CLI](#workflow-versions-api-delete)
+ [Delete a workflow version using an SDK](#workflow-versions-sdk-delete)

## Delete a workflow version using the console
<a name="workflow-versions-console-delete"></a>

**To delete a workflow version**

1. Open the [HealthOmics console](https://console.aws.amazon.com/omics/).

1.  If required, open the left navigation pane (≡). Choose **Private workflows**.

1. On the **Private workflows** page, choose the workflow.

1. On the **Workflow** page, choose the workflow version to delete and choose **Delete selected** from the **Actions** list. 

1. In the **Delete workflow version** modal, enter "confirm" to confirm the deletion.

1. Choose **Delete**.

The console displays a page banner with the deleted workflow version.

## Delete a workflow version using the CLI
<a name="workflow-versions-api-delete"></a>

You can delete a user-defined workflow version using the following CLI command. The combination of workflow ID and version name uniquely identifies the version. 

```
aws omics delete-workflow-version
--workflow-id 9876543
--version-name "my_version"
```

You receive no response to the `delete-workflow-version` request. 

## Delete a workflow version using an SDK
<a name="workflow-versions-sdk-delete"></a>

You can delete a workflow using one of the SDKs.

The following example shows how to delete a workflow using the Python SDK.

```
import boto3

omics = boto3.client('omics')

response = omics.delete_workflow_version(
   workflowID=1234567,
   versionName='3.0.0'
)
```