If you already have the original part06.rar , this file is redundant and can likely be deleted to save disk space, provided the original is not corrupted.
Compare file sizes. If they are identical, delete the (2) version. DiRT.Rally.v1.23.part06 (2).rar
To successfully use this file, the following conditions must be met: If you already have the original part06
Check the destination folder for the original DiRT.Rally.v1.23.part06.rar . DiRT.Rally.v1.23.part06 (2).rar
This file cannot be extracted on its own. It requires all other parts (01 through the final part) to be present in the same directory.
For extraction software (like WinRAR or 7-Zip) to recognize the sequence, the "(2)" must be removed from the filename. The software expects a strict numerical sequence (e.g., ...part05, ...part06, ...part07).