OCI-46275
Conflicting operations on 'string' table
Cause
Audit trail table was being operated by more than one API from different sessions. The simultaneous execution of DBMS_AUDIT_MGMT.INIT_CLEANUP or DBMS_AUDIT_MGMT.SET_AUDIT_TRAIL_LOCATION with SA_SYSDBA.CREATE_POLICY or SA_SYSDBA.DROP_POLICY can cause the conflict.
Action
Wait for the completion of the conflicting SA_SYSDBA procedure and try executing the DBMS_AUDIT_MGMT API again.