Solution : https://service.sap.com/sap/support/notes/1406124 (SAP Service marketplace login required)
Key words : 
analyze fixed pegging relationships, attached source code corrections, symptom sap-support, program  /sapapo/om_upgr_upload_analyse, external constraints, solution implement
Related Notes : 
       
| 1292734 | /SAPAPO/OM_LC_UPGRADE_70: Problems during upgrade | 
| 1065366 | /SAPAPO/OM_LC_UPGRADE_51: Problems during the upgrade |