Solution : https://service.sap.com/sap/support/notes/765193 (SAP Service marketplace login required)
Key words : 
prerequisites program designfunction module bapi_material_bom_group_create transfers change statuses, item idsource ecm1              ecm2              ecm3, symptom function module bapi_material_bom_group_create, ------------------->   0000001target ecm1              ecm2              ecm3, --------------------------->            0000001target ecm1      ecm3     ecm2, ecm1      ecm3     ecm2, change number ecm3, key date ecm3, ------------------->   0000003the change statuses, engineering change management
Related Notes : 
       
| 764990 | How to call BAPI_MATERIAL_BOM_GROUP_CREATE? | 
| 545676 | FAQ BOM data transfer |