Solution : https://service.sap.com/sap/support/notes/65531 (SAP Service marketplace login required)
Key words : 
symptom database table aufk, additional key words performance, prerequisites error solution, manual advance corrections, settlement rule, distribution rule, standard system, unnecessarily, correction, implemented
Related Notes : 
       
| 76065 | Maintenance order: Settlement rule/default rule | 
| 65465 | Collective note: Performance optimization IW32 IW38 |