Solution : https://service.sap.com/sap/support/notes/439110 (SAP Service marketplace login required)
Key words :
'u' = change 'i' = add 'd' = delete 2, condition line information indicating, terms enjoy purchase order, create table parameters pocondheader, add field change_id, table parameters pocond, function module interfaces, extend structure bapimepocondx, 'conditions' -> 'item conditions', condition table
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| 539950 | BAPI_PO_CREATE1: n condition records for a condition type |
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| 529531 | BAPI_PO_CHANGE: New pricing is no longer possible (V1227) |
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| 428621 | EnjoySAP purchase order BAPIs - price det. & cond. change |
| 425996 | BAPI_PO_CREATE1: Termination msge 00151 w/ header conditions |
| 399791 | Enjoy-BAPI_PO...: Condition values are not transferred |
| 197958 | BAPIs for purchase orders: Missing functions |