2668505 - Error: "2EETW000 Table DD07T: Duplicate record during array insert occured" during PREP_IMPORT/TOOLIMPD phase of SUM

The following errors occur during PREP_IMPORT/TOOLIMPD phase of SUM. The entries and package name can be different:

TOOLIMPD.ELG

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DDIC IMPORT ERRORS and RETURN CODE in SAPH750VT1.<SID>
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4 ETW000 successfully set a temporary lock on TADIR for object R3TRTABLDD01 
4 ETW000 1 entry for DD01T inserted (TRWSTAT E*). 
4 ETW690 COMMIT "192" "3383978" 
4 ETW000 6 entries for DD07L inserted (TRWSTAT *). 
4 ETW000 successfully set a temporary lock on TADIR for object R3TRTABLDD07 
2EETW000 Table DD07T: Duplicate record during array insert occured. 
4 ETW000 0 entries for DD07T imported (TRWSTAT D*). 
4 ETW690 COMMIT "2280" "3386258" 
4 ETW000 successfully set a temporary lock on TADIR for object R3TRTABLDD07 
2EETW000 Table DD07T: Duplicate record during array insert occured.

SAP NetWeaver 7.x

 tool import, DD02L, DD02T, DD08L and DD03L , KBA , BC-UPG-TLS-TLA , Upgrade tools for ABAP , HAN-DP-LTR , Use CA-LT-SLT instead , Problem