I am using the following code to add attributes to a product:

$product_attr = get_post_meta(2, '_product_attributes',true);
      
      $product_attr["pa_product-type"] = [
        'name' => "pa_product-type",
        'value' => '',
        'is_visible' => '0',
        'is_taxonomy' => '1'
        ];  
        
    wp_set_object_terms(2, "Caps", pa_product-type , true );
    update_post_meta(2, '_product_attributes', $product_attr);

The attribute is getting updated successfully in the product and is showing up in product edit page. However, the attribute value is not getting updated in wp_wc_product_attributes_lookup table. How to trigger update in this table after updating/adding attributes using the above code?