Barcode Type code128 Support on Item

I have v13.32 installed and trying to enter barcode (our own generated product code)
to the stock/item field. However on the dropdown there is only EAN and UPC-A options and if I’m trying to use them the code format check fails the entry.
How can I add code128 to the list?

PS. UPC-A and EAN have very specific structure and limit of using a number (=barcode) to identify the product.