{% set totalNewVariants = 0 %}
{% for variant in variants %}
{% set variantId = variant.id %}
{% if not variantId %}
{% set totalNewVariants = totalNewVariants + 1 %}
{% set variantId = 'new'~totalNewVariants %}
{% endif %}
{% set namespace = name~'['~variantId~']' %}
{% include 'commerce/products/_variant_matrix_fields' %}
{% endfor %}