Solution : https://service.sap.com/sap/support/notes/447265 (SAP Service marketplace login required)
Key words : 
system displays error message gu506, fi-lc euro changeover, additional key words gcek, fiscal year variant &, integrated consolidation data, shortened fiscal year, normal fiscal year, posting period &, financial accounting, direct update
Related Notes : 
       
| 672255 | Shortened fiscal year/changing fiscal periods | 
| 150598 |