Solution : https://service.sap.com/sap/support/notes/585870 (SAP Service marketplace login required)
Key words :
entry srv_docflow -> select -> detailsselect screen item 10 -> detailsin field, solution transaction crmc_blueprint -> application element -> field groupposition, terms bsp service ui reason, field-> crm object id, crm bsp service, enter crm_object_typein field, enter defaultin field, screen item 20, -> crm object type, document flow register