Carnation Instant Breakfast - Vitamin D milk

The info that is saved for Carnation Instant breakfast assumes the 2% milk is being used. Carnation has the info on their website on how much the values are for Vitamin D milk but when I try and edit the food to make the adjustments (adding the Vitamin D label to the end of the name for clarification) it won't let me save the new food. How can I correct this?