Solution : https://service.sap.com/sap/support/notes/82535 (SAP Service marketplace login required)
Key words : 
itca         description        stats groupnlc   interco, additional key words statistics, create billing documents, item category nlc, statistics update group, statistics group, update group, vbrp-stafo, tvap-stgap, incorrect customizing
Related Notes : 
       
| 204130 | SIS update: Collective note |