3168860 - SUM stops at phase MAIN_SHDIMP/SUBMOD_CP2SHD/SUBMOD_DIFFCP2SHD/DIFFEXPABAP_CIGPR: "creation of shadow class /PERSONAS/CL_TRANSFER_UTILS failed with error MIA_CLASS_ALREADY_EXISTS"

Software Update Manger (SUM) stops in phase MAIN_SHDIMP/SUBMOD_CP2SHD/SUBMOD_DIFFCP2SHD/DIFFEXPABAP_CIGPR during upgrade.

[SAPup_troubleticket.log]
...
Summary of Error:
=================
- Module:              MAIN_SHDIMP/Shadow Import
- Phase Name:          MAIN_SHDIMP/SUBMOD_CP2SHD/SUBMOD_DIFFCP2SHD/DIFFEXPABAP_CIGPR
- Phase Log File:      DIFFEXPPI.LOG
- Error Message:       Last error code set:
1 processes failed

[DIFFEXPPI.LOG]
...
1EETQ399 Log Scanner: Found 2 aborts during the log scan (exit code: 16)!
1EETQ399 Log Scanner: Found 1 errors during the log scan (exit code: 16)!
2EETQ109 Found 1 errors in logs.
1 ETQ000 ==================================================
4 ETQ010 Date & Time: yyyymmddhhmmss
2 ETQ102 Finished execution of 13 process(es).
3 ETQ127 Interval: yyyymmddhhmmss-yyyymmddhhmmss, time  1932.0/  716.8/  123.5/0MB real/usr/sys/maxmem
2 ETQ108 Analyzing logs for errors.
3 ETQ114 Analyzed 13 log files.
2EETQ106 1 processes failed.
1EETQ399 Last error code set is: 1 processes failed
1EETQ204 Upgrade phase "DIFFEXPABAP_CIGPR" aborted with severe errors ("yyyymmddhhmmss")

[DIFFEXPPI.ELG]
################################################################################################
# Phase: DIFFEXPABAP_CIGPR
# Description: CUSTOMER, ADD ON, GENERATED, SP, AND MODIFIED OBJECTS (ABAP)-Export ERRORS
################################################################################################

#==============================================================================================#
# Find the detailed information in log 'SAPECCI750.<SID>':
#==============================================================================================#

4 ETW000   0 d /   1 i /   0 u /   0 =   0% ucf SEOCLASSTX~
4 ETW000   1 entry from SEOCLASSTX copied (/PERSONAS/CL_TRANSFER_UTILS   *).
4 ETW000   1 entry from DDTYPES copied (/PERSONAS/CL_TRANSFER_UTILS   *).
4 ETW686 end copying of "LIMUCLSD/PERSONAS/CL_TRANSFER_UTILS".
3 ETW685Xstart copying of "LIMUMETH/PERSONAS/CL_TRANSFER_UTILS   SHOW_IMPORT_OPTIONS_POP_UP" ...
1AETW000 ===> HALT: creation of shadow class /PERSONAS/CL_TRANSFER_UTILS failed with error MIA_CLASS_ALREADY_EXISTS Please contact the SAP support.

4 ETW690 ROLLBACK "14420" "14420"
4 ETW000 End of Transport (0016).
4 ETW000 date&time: dd.mm.yyyy - hh:mm:ss
4 ETW000 1 error occured.
2EETP200 Export with errors, request will not be imported
1 ETP111 exit code           : "16"

kernel, MAIN_SHDIMP/SUBMOD_CP2SHD/SUBMOD_DIFFCP2SHD/DIFFEXPABAP_CIGPR, MIA_CLASS_ALREADY_EXISTS, /PERSONAS/CL_TRANSFER_UTILS, shadow class , KBA , BC-UPG-TLS-TLA , Upgrade tools for ABAP , Problem