How to confirm Sales Return if the following error ‘Duplicate trace line’ (VTINVLN) occurs on confirm button click ?

Cause:
System will not allow same Invoice line number twice in one record, if return of one item are to different location is required.

System will show error msg ‘ single invoice teace line item cannot be repeated in more then one line of the of Sales return'(VTINVLN).
Remedies:
Invoice Line No. is the detail line number of the invoice against which the Sales return has been made.

User should save two different Sales return records, if return to be done to two different location of the same item.