By default the shopping cart will always validate item availability for all items in a user's cart. If an item becomes unavailable or the price changes, the user will be required to remove the item or accept the price change before continuing checkout. To disable this behavior, change the options below to "Inactive." However, doing so could result in orders for items that are no longer available.
1) Click 'Payment Options' under the 'Commerce' heading of the Control Panel.
2) Under the 'Cart Item Validation' heading, edit your cart item validation settings.
3) When you are finished, scroll down & click the 'Save' button.
