Solution : https://service.sap.com/sap/support/notes/78308 (SAP Service marketplace login required)
Key words : 
system responds differently, additional key words, attached program corrections, master record table, class table, classify objects, active check, identical valuations, overview screen, assignment screen
Related Notes : 
       
| 83534 | Inconsistency message for multiple classification | 
| 83531 | Check same classification | 
| 80898 | 3.1I: Check for identical classification |