Solution : https://service.sap.com/sap/support/notes/1128990 (SAP Service marketplace login required)
Key words : 
undo delete operations executed erroneously, large redo log load, largest redo log load, required redo logs automatically, required offline redo logs, $logmnr_contentswhere  operation = 'commit'group, redo log load, offline redo logs, $logmnr_contentswhere  operation = 'delete', required redo logs
Related Notes : 
       
| 1144558 | ORA-08103 or ORA-01410 in connection with DROPs | 
| 701562 | Using the Logminer to analyze redo logs | 
| 605062 | FAQ: Restore and recovery |