Solution : https://service.sap.com/sap/support/notes/351928 (SAP Service marketplace login required)
Key words :
kb21 enter activity allocationkp26 - change activity type/price planningif, cost center/activity type, cost centers/activity types, additional key words okc3, tables cokl - cssl - onr00/onrkl, object type kl, reset transaction data, resetting transaction data, including planning data, missing cssl records
Related Notes :
| 46575 | KP26 ff.: Missing update due to missing CSSL record |