Solution : https://service.sap.com/sap/support/notes/644364 (SAP Service marketplace login required)
Key words :
function modulesk_database_enqueuek_database_dequeuek_database_enqueue_againan optional import parameter i_csla_lock, cost center/activity type combination, sender cost center/activity type, system issues message ki501, sender cost center, allocation cost element, activity type simultaneously, involved activity type, activity type category, attached program correction
Related Notes :
940407 | KP 26: Message KI 501 with same activity type |
643483 | KP26: KI501 for the same activity type |
620417 | KP26: Simultaneous master data change possible |
79634 | KP06ff.: Lock logic in manual planning |