Solution : https://service.sap.com/sap/support/notes/75943 (SAP Service marketplace login required)
Summary : 
      
Key words : 
additional key words allocation, special procurement key, longer compartment occur, higher item number, item number, incorrect allocation, higher release, item numbers, longer displayed, phantom assemblies
Related Notes : 
       
| 101281 | CA01: Upgrade problem for component allocation | 
| 83289 | Printing component allocatn of phantom assemblies | 
| 82920 | Component allocation of phantom assemblies (BOM) | 
| 82644 | Component allocation of phantom assemblies (routing) | 
| 73259 | CO01: Allocating components to an operation |