Solution : https://service.sap.com/sap/support/notes/545846 (SAP Service marketplace login required)
Key words : 
check number range objects prow, system display error message m3 899, system displays error message m3 368, customer-specific screen sequence, customer-specific screen sequences, change existing valuation records, error message m3 695, previous material master transactions, customer-specific languages, maintain alternative units
Related Notes : 
       
| 1520235 | MG038:AKTVSTATUS must be specified for the origin ty.defined | 
| 1513292 | CD: Unit-based display in planned changes |