Solution : https://service.sap.com/sap/support/notes/1382941 (SAP Service marketplace login required)
Key words : 
terms om_object_locked solution implement, attached source code corrections, atp characteristics, locking conflicts, transaction data
Related Notes : 
       
| 1292734 | /SAPAPO/OM_LC_UPGRADE_70: Problems during upgrade | 
| 1065366 | /SAPAPO/OM_LC_UPGRADE_51: Problems during the upgrade |