Cannot create purchase receipt for item x with the existing serial number x

Screenshot 2023-09-07 at 10.51.00 AM

I received this message, when trying to do a purchase return. Here’s what happened prior:

  1. Raised PO
  2. Raised Purchase invoice on the PO
  3. Made 100% upfront payment on the Purchase Invoice
  4. Raised Purchase receipt, rejected qty = 1 → serial no. for item created
  5. Raised debit note against Purchase invoice
  6. Raised Purchase return, rejected qty = -1 → received the error message