In this case, you have to deactivate license on the WP installation manually. You can do so by following these steps:

1) Add the following code to your theme functions.php:

add_action( 'init', function () {
    if ( isset( $_GET['forcedeactivate'] ) ) {
        delete_option( 'vc_license_activation_key' );
        delete_option( 'wpb_js_js_composer_purchase_code' );
    }
} );

2) Login into your website dashboard and visit: website_domain_here/wp-admin/index.php?forcedeactivate

3) Remove the code added in step 1.

4) Login into our support portal: http://support.wpbakery.com/ and under licenses: http://support.wpbakery.com/licenses deactivate it from the existing url.

5) Activate the license as per: https://vc.wpbakery.com/video-academy/activate-visual-composer-wordpress-license/