These fields are optional for amending a plan:
- planInformation.code
- planInformation.name
- planInformation.description
- planInformation.billingCycles.total
- Only increases to the number of billing cycles are allowed.
- processingInformation.subscriptionBillingOptions.applyTo
- Default value isNEW.
- orderInformation.amountDetails.billingAmount
- orderInformation.amountDetails.setupFee