3212507 - Issue with loading duplicated records to Direct Update ADSO via AMDP with UPSERT

There was a change in behavior after updating their system from 7.50 SP21 to SAP_BW 750 0023 SAPK-75023INSAPBW and HANA DB to SP6. Before, any duplicate records would simply get overwritten. After the update, they receive the following errors in the logs:

SQL error with code '301'. See the following SQL message:
=> unique constraint violated: Table(/BIC/XXXXXXX), Index(/BIC/XXXXXXX~0) w
=> ith error: unique constraint violation in self check for table BX2::SAPBWHANA:/B
=> IC/XXXXXXXen, column='', value='32332c535449434b204551554956414c454e5420564f
=> 4c554d453b332c43474c3b322c4443', pos=35895; indexname=/BIC/XXXXXXX~0
Exception CX_RSDHA_MSG logged

• SAPK-75023INSAPBW
• SAP HANA, platform edition 2.0 SPS06

unique constraint violation in self check for table, SQL error with code '301',  , KBA , HAN-DB-ENG-BW , SAP HANA BW Engine , Problem