Editing a Recurring Payment

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so the problem in the previous is the start date in creating a recurring, now my problem is in the editing. It also show the Exception Error. I tried the sample

`var recurringPayment = new RecurringPayment { PaymentAmount = 15.00M, ExecutionFrequencyType = ExecutionFrequencyType.LastOfMonth };

var result = await customerService.UpdateRecurringPaymentAsync(recurringPayment);`

I also tried giving it a start date and end date..