Solution : https://service.sap.com/sap/support/notes/607135 (SAP Service marketplace login required)
Key words :
component type stlty, tab page 'assignments', newly made assignments, add field bstlt, incorrect main assembly, main assembly, existing assignments, bstlt reason, detail screen, system displays
Related Notes :
| 640124 | Performance improvement in the order processing |
| 603095 | CN22/CN33: Incorrect main assembly on 'Assignments' tab page |
| 544504 | Additional information for the material component |