Solution : https://service.sap.com/sap/support/notes/802479 (SAP Service marketplace login required)
Key words :
terms single record entry, function module bapi_trip_create_from_data, accommodations flat rates, relevant support package, entry disappears, 'deductions' tab, country version 19, pr01 reason, program error, implement note 791699
Related Notes :
843628 | BAPI_TRIP_CREATE_FROM_DATA: Portugal/number of nights |
791699 | PR01: Deduction 'Night for' is not saved |