Repair Order - Receive Different Serial Number in Advance Exchange Process

Hi

We have a business scenario - Where Repair Order is created against Item#A1, Serial # S1. This creates Ship and Return Logistics Lines.

Against the Ship Line - New Serial Number is shipped out as expected (Item # A1, Serial # S11)

However, against the Return Line, Customer is physically returning below mentioned cases

1. Different item (Item # A2, Serial # S1)
2. Different serial number (Item # A1, Serial # S2)

Please suggest, how to receive a different Item or a different Serial Number on the same repair without cancelling the existing logistics line and adding new logistics line.

Thanks