The shipped library names are unique for this release. If you are upgrading, decide whether you want to use your current library names. If this is a new release, you still might want to consider how to name the files.
You do not need to remove previous releases from your Sybase libraries because default names shipped with this release create an entirely unique set of release libraries. You can change them, however, based on naming standards at your site.
When the upgrade is complete and tested, be sure to replace the old LOADLIB name or add the new LOADLIB name to the DFHRPL concatenation for the selected CICS regions, as described in the installation instructions.
If you are going to continue to use the old Sybase library names, delete all members before installing the new ones with the new version.