There is a problem as by mistake we have insert wrong packing slip no. for a sales order. how and where to change the packing slip number for sales order???

Dear Vebdata,

Can you please provide me the details. I mean what is the current status of your order and through which session you puted wrong packing slip number..

Better you can share screen shot..

This question interests me too.
When receiving goods through "warehouse receipts"(whinh3512m000), we have to enter packing slip number which is set mandatory in our environement.
Sometimes, users enters wrong numbers.
The problem is that once receiption order is confirmed, we can no more correct the field.
Since the packing slip number is used in accouting to check the exact quantities to pay for, accountant cannot find the reception if the packing slip number entered in logistics mismatch the one that supplier sent.