Solution : https://service.sap.com/sap/support/notes/601892 (SAP Service marketplace login required)
Key words :
bdoc error xr100 occurs, existing business partner, business partner, sd customer, vice versa, subsequent download, filled correctly, transaction crmm_bupa_map, terms bp_exchange_crm_to_r3_bp, data inconsistency
Related Notes :
538163 | Correction report for CRMKUNNR CRMM_BUT_CUSTNO in IS-U |
537314 | Delta upload partner from CRM w/o SD customer causes error |
438424 | Information on marketing scenario: Integration IS-U/CRM/BW |