You can recover from a Request is a replay error.
Symptoms
Request is a replay (34)
Resolving the problem
This request has the same Kerberos token as an earlier
request. This is probably because a .NET client is not using CE .NET
API calls and is reusing a WSE KerberosToken/KerberosToken2 or a WCF
KerberosRequestorSecurityToken object rather than reconstructing it
for each request.