Merging 2 rows into 1 row

I have a field:

=Fields!Attachment_Name.Value that returns values on 2 separate rows

Row 1 LTC 34 EARC

Row 2 LTC 34 EARC v04_13

How can I get the 2 rows to merge into 1 row to show "LTC 34 EARC" only

Thank you