Solution : https://service.sap.com/sap/support/notes/1268933 (SAP Service marketplace login required)
Key words : 
double partno assigments set 'repair' flag, set radio button 'unique index', pressing function key 'indexes' 5, prerequisites programm error solution 1, popup double click, attached program 'rsar_rstsodspart_duplicates', remove reported inconsistencies, goto index 'maintainance', goto change mode, sap netweaver bi 7
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