Diagnosis
A message protected by an XML Signature was resent.

Procedure
The request received by the system (i.e. a consumer request or providerresponse) was protected by an XML Signature to ensure the integrity ofthe message.
The system stores the signature values of the XML Signature to preventreplay attacks within a short timeframe, and checks if such a signaturehas been sent before.
The received message contained a signature value it had received before,indicating a message replay.

Procedure for System Administration
Contact the communication partner to check how this situation couldoccur.