Solution : https://service.sap.com/sap/support/notes/534787 (SAP Service marketplace login required)
Key words : 
transporting output devices, 'spool server' field, terms spool server, relevant support package, relevant server, system overwrites, transported entry, existing servers, classification reason, program error
Related Notes : 
       
| 130499 | Transporting output devices | 
| 64337 | Transporting output devices (printers) |