Solution : https://service.sap.com/sap/support/notes/1442184 (SAP Service marketplace login required)
Key words :
service '/sap/bc/srt/rfc/sap/ags_wbs_solar_if_mercury'- start transaction sicf- press f8- search, tabstrip 'service administration'- select entry 'single service configuration'- search, entry '/sap/bc/srt/rfc/sap/ags_wbs_solar_if_mercury'-, terms st-qca soamanager co_ags_hpqcsmblueprint_handler co_ict_service_desk_api_mqc solution settings, service desk integration- start transaction soamanager- click, installing st support package stack 22, - start transaction soamanager- click, 3 unprocessed mustunderstand header{http, 'suppress id transfer'- savethe, 'suppress id transfer'- save