If a product has been attached to a collaborator and it is converted to have variants. All the variants will be automatically attached to the collaborator.
You have a product ‘Hat’. This product is attached to your collaborator Jenny.
In your eCommerce platform you change this product to be, Hat (S) and Hat (L). This is reflected in CollabPay. The product will now be attached to Jenny the same as it was before there were variants.