}
	if len(revWebhooks) > 1 {
		return "", fmt.Errorf("cannot modify tag: found multiple canonical webhooks with revision %q", opts.Revision)
	}

	whs, err := GetWebhooksWithTag(ctx, client.Kube(), opts.Tag)
	if err != nil {
		return "", err
	}
	if len(whs) > 0 && !opts.Overwrite {
		return "", fmt.Errorf("revision tag %q already exists, and --overwrite is false", opts.Tag)
	}

	return nil
}

// removeTag removes an existing revision tag.
func removeTag(ctx context.Context, kubeClient kubernetes.Interface, tagName string, skipConfirmation bool, w io.Writer) error {
	webhooks, err := GetWebhooksWithTag(ctx, kubeClient, tagName)
	if err != nil {
		return fmt.Errorf("failed to retrieve tag with name %s: %v", tagName, err)
	}
	if len(webhooks) == 0 {