Automatic Convertion To Variations

I read this doc for converting my old combination to variations.

http://docs.cs-cart.com/4.6.x/user_guide/manage_products/products/convert_combinations_to_variations.html?highlight=option%20variation

But I have more than 300 products to convert. Can I do it automatically with an API or in the database directly or I have to do it one by one ?

Thanks

Unfortunately, in the current version you have to do it one by one