2593574 - SOLMAN upgrade fails in SHADOW_IMPORT_INC phase due to conflicting unique indexes on table COMC_ATTRIBUTE (DB6)

• You are performing a Solution Manager upgrade.
• Upgrade step MAIN_SHDIMP/SUBMOD_SHDIMP/SHADOW_IMPORT_INC fails with this error:

        Checks after phase MAIN_SHDIMP/SUBMOD_SHDIMP/SHADOW_IMPORT_INC were negative!
        Last error code set: Detected 1 errors summarized in 'SHDALLIMP.ELG' Calling '/usr/sap/P10/SUM/SUM/abap/exe/tp' failed with return code 8, check /usr/sap/P10/SUM/SUM/abap/log/SAPup.ECO for details
        ERROR:
        Detected the following errors:
        /usr/sap/P10/SUM/SUM/abap/log/SAPK-702BRINBBPCRM.P10:
       4 ETW000 [ dev trc,00000] Sat Jan 13 16:52:22 2018
       4 ETW000 [ dev trc,00000] table logging switched off for all clients
       4 ETW000 [ dbrsbuf ,00000] ***LOG BBC=>nametab inconsistency for table TADIR~ regarding view buffering
       4 ETW000 1 entry for TADIR~ updated (R3TRATTR80215ADE55241DDF8CE636D957DE4033 ).
       4 ETW000 0 entries of SMODILOG updated (ATTR80215ADE55241DDF8CE636D957DE4033 *)
       2EETW000 Update and insert sequence failed due to conflicting unique indexes on table COMC_ATTRIBUTE (please read SAP note 626915 for details)

• Initially, the table COMC_ATTRIBUTE had two unique indexes and a primary key constraint at database level: COMC_ATTRIBUTE~0 and COMC_ATTRIBUTE~UNI. 
• You dropped the ~UNI index as per SAP Note 1795072 - Error in COMC_ATTRIBUTE table during upgrade and re-ran the upgrade. It did not help. 
• You dropped the index ~0 also, it did not help and you still get the same error.

• SAP Solution Manager (SOLMAN) 7.x on DB2 LUW (DB6)

DB6, upgrade, solman, "Solution Manager", COMC_ATTRIBUTE, "primary key", "unique index", SHADOW_IMPORT_INC , KBA , BC-DB-DB6 , DB2 Universal Database for Unix / NT , BC-DB-DB6-UPG , Upgrade SAP System , Problem