Solution : https://service.sap.com/sap/support/notes/459288 (SAP Service marketplace login required)
Key words :
production order created automatically, sales order item, sales order, production order, process order, schedule line, completely arbitrary, scheduling agreement, change mode, assigned arbitrarily
Related Notes :
616505 | COHV: Rescheduling with date from sales order |
414403 | Delivery date from contract and not from delivery schedule |
135404 | Field KDEIN of sales order not in planned order |