Solution : https://service.sap.com/sap/support/notes/1046374 (SAP Service marketplace login required)
Key words :
avoid entering starting/ending date, manually entering main lines, -empty starting/ending date, enter starting date, avoid data inconsistenyc, creating/changing records, refered support packages, ending date, modified manually, table t7sia3
Related Notes :
| 1050613 | LCP SI 40 Legal change patch for SI |