Solution : https://service.sap.com/sap/support/notes/511230 (SAP Service marketplace login required)
Key words :
maintain structure scope 'c', maintain field 'cnfg, incorrect customizing settings, structure scope, sales order, multiple levels, lower level, system determines, terms va01, variant prices
Related Notes :
| 774346 | Composite SAP Note: Material variants |
| 549163 | FAQ: Configuration in the sales order |