2681021 - Duplicate key issue for table DDNTT~ during SUM run

The SAP Software Update Manager(SUM) encounters duplicate key issue while creating index for table DDNTT~ in one of the following upgrade phases:

• MAIN_SHDCRE/SQLDB_DDNTT_UUID
• MAIN_SHDCRE/NTACT_NODBPOS

The error in the following pattern can be found in the log file SQLDBSCRIPT.OUT.

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1 ETQ000 ==================================================
1 ETQ399 Executing SQL script '../var/SQLDBSCRIPT.TQL'.
2 ETQ399 Connecting to database '<db type>'.
4 ETQ399 Ignoring uncritical DB statements as requested by user.
4 ETQ010 Date & Time: <time stamp>
3 ETQ398 SQL: DROP INDEX "DDNTT___UPG"
4 ETQ399 Ignoring uncritical DB statements as requested by user.
3 ETQ398 SQL: CREATE UNIQUE INDEX "DDNTT___UPG" on "DDNTT~" ("UUID") ONLINE
4 ETQ010 Date & Time: <time stamp>
1EETQ008 Error message: <DB error>:
1EETQ008 <DB error code>: cannot CREATE UNIQUE INDEX;
1EETQ009Xduplicate keys found
1EETQ003 exit code: "20"
4 ETQ399 Rollback.

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IBM AIX Operating System

DDNTT___UPG, DDNTT~, ORA-01452, SQLDB_DDNTT_UUID, AIX, SUM, UPGRADE, UPDATE, SQLDBSCRIPT, INDEX, UNIQUE, DUPLICATE , KBA , BC-UPG-TLS-TLA , Upgrade tools for ABAP , BC-DB-DBI , DB Independent Database Interface , Problem