ORA-01353: existing Logminer session Cause: An attempt was made to execute DBMS_LOGMNR_D.SET_TABLESPACE
while a Logminer session(s) was active. Action: First cause all Logminer sessions to be closed. A Logminer session can
exist as a result of executing DBMS_LOGMNR.START_LOGMNR or as the result
of using Oracle features such as Data Guard SQL Apply or Streams which use
Logminer. Next, execute DBMS_LOGMNR_D.SET_TABLESPACE.