Solution : https://service.sap.com/sap/support/notes/84849 (SAP Service marketplace login required)
Key words : 
additional key words vbap-prctr, profit center determination, vbap-vrkme, profit center, sales documents, time change, manual unit, sales unit, material master, changing material
Related Notes : 
       
| 112974 | Subst. Prof.ctr subst.,create KDAUFf.cross-CC sales | 
| 85471 | Profit center cannot be changed in sales order |