Solution : https://service.sap.com/sap/support/notes/162400 (SAP Service marketplace login required)
Key words :
support statistical additional account assignments, required-entry field simultanously insert, additional key words kot2_opa, control indicator 'integrated planning', status-dependent field selection, order status number '&v2&', field selection 'statistical order', indicator 'statistical order', indicator 'integrated planning', correct existing settings
Related Notes :
| 506607 | INFO: Field sel. for int. order master data in order type |
| 188667 | Order types maintenance: Error KO490 / KO835 |
| 163099 | Conversion settings for the cost center field |