Solution : https://service.sap.com/sap/support/notes/661786 (SAP Service marketplace login required)
Key words : 
terms termination reason, update termination, class assignment, exceptional cases, solution refer, source code, transaction, clap_ddb_update_classification, prerequisites, corrections
Related Notes : 
       
| 418242 | CLAP_DDB_UPDATE_CLASSIFICATION f. charact.val.assignm.(CLO0) |