The Retry Reason field indicates the reason that the transaction had been retried in the past:
Internal transient errors (typically communication errors or processor server downtimes) are automatically retried every two hours.
N/A indicates a successful payment, so no retry is required.
Decline indicates that the transaction was declined, so you can retry now, or let the system retry automatically as you specified in the Maximum Retry Number of Days in the Create Profile page.
Force payment indicates that you had previously performed a manual retry that had failed.