Solution : https://service.sap.com/sap/support/notes/629968 (SAP Service marketplace login required)
Key words : 
sap standard production programpackage, report regenerates crm billing, terms act_620 reason, start transaction se38, standard program befg_prep_upg_from_3x, attached correction instructions, structure /1bea/s_crmb_dli_comp, regenerate crm billing, table /1bea/s_crmb_dli_dp, crm billing
Related Notes : 
       
| 1276895 | Add. info. about Upgrading to SAP Solution Manager 7.0 EHP1 | 
| 1108861 | Add. info. on upgrading to SAP CRM 5.0 SR3 ABAP | 
| 961511 | Add. info.: Upgrade to SAP CRM 5.0 SR2 ABAP | 
| 913849 | Add. info.: Upgrade to SAP CRM 5.0 ABAP SR1 | 
| 826488 | Enhancements to upgrade on SAP CRM 5.0 ABAP | 
| 737800 | Enhancements to upgrade on SAP CRM 4.0 SR1 | 
| 596514 | Additional information about upgrading to SAP CRM 4.0/SRM Se |