Set to YES if you want to reinstall the same or older version of software as the version existing on your system. Note that a YES answer is not valid for updates; an overwrite can only be done on base filesets. The default option is NO.
Note: You do not need to set this option to YES if you are applying a later version.
If you set this option to YES, you must set the "AUTOMATICALLY install requisite software?" option to NO.