The scenario is that purchase order confirmation batch job is running recurrently and picking up purchase orders to process and confirm. Meanwhile one of the purchase orders to be confirmed had confirmation dialog for a manual confirmation open. Batch job has already confirmed the same purchase order and now the user will confirm the purchase order as well which will show a 2nd purchase order confirmation and 2 confirmation journals as a result. 

User needs to send the notification email once the confirmation journal is created. as there will be duplicated confirmation journals been created, client will receive duplication notification.  

client hope there will be a warning when user try to confirm the PO from UI to prevent it confirm for a second time without any change on the PO.