Solution : https://service.sap.com/sap/support/notes/325681 (SAP Service marketplace login required)
Key words :
enter short text 'automatic insertion, enter message class cocm, additional key words ocm, start transaction se91, select subobject 'messages', press 'individual maint, program termination occurs, order change management, function key ', change managementmessage_type_x
Related Notes :
350282 | COCM1: configuration is no longer correct after OCM |