[quote user="Ramit Paul"]
Hi,
Deleting PO is only possible in draft state, you need to recall/cancel the workflow to get the PO IN DRAFT state then you nay try.
However, I would not delete PO as long as they are in cancelled state.
[/quote]
Thanks for answering. I forgot to tell issue about workflow, it is also not applicable I mean the button is gray so I cant recall or cancel workflow. So I cant change their states to draft unfortunately. Do you have any idea about it?