Go to menu Settings -> Receiving & Delivery tab-> check option “ Create an inventory receipt when the Purchase Order is approved” and “ Select the warehouse to auto-receive inventory generated from purchase orders”.
Only unapproved stock receipts can be edited
If you check the option “Allow delete of Inventory receipt voucher or Inventory delivery voucher (after approval)” allows you to delete approved inventory receiving.
Deleting an inventory receiving with approved status ⇒ reduces the inventory of the items in the inventory receiving voucher, and the corresponding serial numbers (if any) are also deleted.