Thanks for your reply Yes, there aren't a sufficient number of modern Macs for me to test. But, I'v upgraded an abnormal macOS 10.15 to macOS 13.0, two content filter with the same name still exists, must by removing the file '/Library/Preferences/com.apple.networkextension.plist' way to clean up. You can ask me for more info, and I must figure out these questions: Is this a System-Level Bug? Why do I have 2 content filter with the same name and how can I avoid this problem? Is there a way to remove the wrong content filter without closing SIP and delete the file?