Solution : https://service.sap.com/sap/support/notes/921445 (SAP Service marketplace login required)
Key words : 
change business documents include va01, customers establish organizational rules, terms dealer business management, symptom dear dbm customer, sap dealer business management, specific business document types, dbm-related business documents, standard erp core transactions, solution sap recommends, underlaying business objects
Related Notes : 
       
| 969602 | Current Release Restrictions for DBM 6.0 | 
| 855514 | Current Release Restrictions for DBM 500 for Ramp Up | 
| 199703 | Goods receipt for inbound delivery using MB0A, MIGO, VL32 |