Solution : https://service.sap.com/sap/support/notes/1620005 (SAP Service marketplace login required)
Key words : 
depreciation posting cycle period weighting, currency rounding settings memo, contace sap development support, group assets fiscal year, closed fiscal year, terms t093b-abgja, t093b merged, table t093b, company code, asset accounting
Related Notes : 
       
| 1619001 | Transporting view data does not work | 
| 672255 | Shortened fiscal year/changing fiscal periods |