Solution : https://service.sap.com/sap/support/notes/182604 (SAP Service marketplace login required)
Key words : 
additional key words stafo, attached advance correction, statistics update group, existing delivery, manually add, delivery item, order reference, solution implement, implement note 140278, statistics
Related Notes : 
       
| 727267 | Statistics update delivery for stock transport order | 
| 316996 | SIS:Reorg./analysis for del.itms w/out ord.ref.differ | 
| 204130 | SIS update: Collective note | 
| 174141 | SIS: Collective note - Customizing | 
| 140278 | Statistics group customer f. deliveries w/o SD ref. | 
| 140208 | SIS reorganization: Deliveries without order reference |