Changes to be applied in ZEOC, is needs to check the company code checking for creating/changing customers under program FIBPTH_SAVE_DATA that affect not just ZEOC account group but all account group that checked duplicates against FITHA_BRNCH table.
Duplicate customers based on Branch Codes were checked against table FITHA_BRNCH (Branch details of Business Partner), however upon checking, the code that updates the created customers on FITHA_BRNCH table does not populate the field BUKRS as shown on below screenshot.