This action generates the DiscountGroupIsActiveSet Message.
If the [limit](/../api/limits#discount-groups) for active Discount Groups has been reached, a [MaxDiscountGroupsReached](ctp:api:type:MaxDiscountGroupsReachedError) error is returned.
Readonly
New value to set.
A DiscountGroup must be active for its CartDiscounts to be considered during discount application.
This action generates the DiscountGroupIsActiveSet Message.