Are you positive you changed the copy that SAS provides? If you start a new SAS session, do you see your modifications or do you see the original SAS-supplied version. While it is possible for some users to change permissions--do so at your own peril--normally, you should not be able to change a SASHelp data set.
The SAS Users Group for Administrators (SUGA) is open to all SAS administrators and architects who install, update, manage or maintain a SAS deployment.
Learn how to install the SAS Viya CLI and a few commands you may find useful in this video by SAS’ Darrell Barton.
Find more tutorials on the SAS Users YouTube channel.