Symptom:
log from IMS-Auth facility in large numbers.
 
Jul 23 13:42:46 10.112.249.20 evlogd: [local-60sec46.214] [ims-authorizatn 98146 error] [3/1/8682 <sessmgr:208> imsa_session.c:5679] [callid 3dc23944] [software internal system syslog] <GTP> Invalid Bearer auth dec - No PCC Rules are present in the CCA-U corresponding to the CCR-U with RESOURCE_MODIFICATION_REQUEST.

Conditions:
1) Receives secondary CPC request from UE
2) We initiates a CCR-U to PCRF ( but I don't see any additional useful info going in that CCR message which we are trying to report )
3) Receives corresponding CCR-A from PCRF ( just indicating the diameter-success )
4) We pop up this  [ims-authorizatn 98146 error]  log message in syslog.