Solution : https://service.sap.com/sap/support/notes/420768 (SAP Service marketplace login required)
Key words : 
sales-area-dependent blocking reasons, additional key words bp_misc, run cross-client, cross-client api, logical destinations valid, db update' checkbox, plan report crm_bupa_migrate_sblocks, xpra program crm_bupa_migrate_sblocks, existing business partners, sales areas
Related Notes : 
       
| 419938 | |
| 396690 | SAP CRM 3.0: Information on Upgrade |