7b7c4f6f_various_Reason_Codes_indicate___Description
[Reason Code] 104 [Reply Flag (SCMP)] DDUPLICATE [Possible Action] Resend the request with a unique merchantReferenceCode value. [Description] 
Declined - The merchantReferenceCode sent with this authorization request matches the merchantReferenceCode of another authorization request that you sent in the last 15 minutes.
CyberSource Support Center - What do the various Reason Codes indicate?
Description