What does the 175 platform CSID mean to be protected by the platform? What I said when I came up with the name was that I was not allowed to have that name anyway. ,

Your CSID is protected, which means that your ID prefix has been taken by a community.

Because you are not from that group, you cannot use this ID prefix to avoid being mistaken for being from that group.

If it is a duplicate name, the 175 system will not say that it is protected, but will say that your name has already been used.