Solution : https://service.sap.com/sap/support/notes/480495 (SAP Service marketplace login required)
Key words : 
terms event handler reason, enter function module crm_event_exetime_multi_ow, change interface parameter it_orderadm_h, function module crm_event_exetime_multi_ow, attached advance correction, source code corrections, call transaction se37, parameter it_orderadm_h, function module, choose 'change'
Related Notes : 
       
| 442332 | SAPKU30006: Support Package 6 for EBP 3.0/CRM 3.0 |