2791039 - DB error "name is already used by an existing object" in upgrade phase SCEXEC_ALIAS

• While performing an upgrade or update using the Software Update Manager (SUM) an error occurred in phase MAIN_SHDIMP/SUBMOD_SHDALIASCRE/SCEXEC_ALIAS!
• The error reported is similar to :

Last error code set: 3 error(s) during parallel execution of processes, check 'SQLEXEAL.LOG' for details 6 processes failed, check 'SCEXEC_A.*' for details

ERROR:
The following errors were detected in the log files:

# /usr/sap/SID/SUM/abap/log/PTALDC14.LOG:
3 ETQ398 SQL: DROP SYNONYM "KFM_PF_BW_ASSIGN"
3 ETQ398 SQL: CREATE SYNONYM "KFM_PF_BW_ASSIGN" FOR SAPSR3."KFM_PF_BW_ASSIGN~"
3 ETQ398 SQL: DROP SYNONYM "KNA1_ACT"
3 ETQ398 SQL: CREATE SYNONYM "KNA1_ACT" FOR SAPSR3."KNA1_ACT"
4 ETQ010 Date & Time: 20190412091445 
1EETQ008 Error message: DBSL error 102 (db code 955): 
1EETQ009XORA-00955: name is already used by an existing object

Note: The log above shows an Oracle error as example, the same issue could happen to systems using other Databases

SCEXEC_ALIAS, name is already used by an existing object, ORA-00955, SQLEXEAL.LOG, CREATE SYNONYM, 1EETQ008 Error message: DBSL error 102 (db code 955), ACT_UPG, The name of the object to be created is identical to the existing name , KBA , BC-UPG-TLS-TLA , Upgrade tools for ABAP , Problem