Solution : https://service.sap.com/sap/support/notes/883953 (SAP Service marketplace login required)
Key words :
sap_ec_bbp_accountant sap_ec_bbp_administrator sap_ec_bbp_bidder sap_ec_bbp_company_admin sap_ec_bbp_employee sap_ec_bbp_manager sap_ec_bbp_op_purchaser sap_ec_bbp_purchaser sap_ec_bbp_recipient sap_ec_bbp_secretary sap_ec_bbp_st_purchaser sap_ec_bbp_vendor 2, bbp_ctr_2 bbp_pd_auc bbp_pd_bid bbp_pd_cnf bbp_pd_ctr bbp_pd_inv bbp_pd_pco bbp_pd_po bbp_pd_quo bbp_pd_sc bbp_pd_vl, authorization object 'plog' sap_ec_bbp_employee, human resources -> personnel planning, add entry 'bbp_trigg' manually, add authorization object 's_user_agr', updated srm single roles, authorization profile sap_ec_bbp_administrator, authorization object 'plog', add objecttyp 'vg'