It means previous versions remain open, but ownership trumps any license restrictions.
They don't license the code to themselves, they just have it. And if they want to close source it they can.
GPLv3 and copyleft only work to protect against non-owners doing that. CLA means a project is not strongly open source, the company doing that CLA can rugpull at any time.
The fact a project even has a CLA should be extremely suspect, because this is exactly what you would use that for. To ensure you can harvest contributions and none of those contributers will stand in your way when you later burn the bridges and enshittify.
The new page has a clear section for north korea, and lists wars newer than the ugandan bush war for it.
To me it seems more like someone noticed the original page was severely behind and decided to therefore merge it into the korea article, since apparently noone was maintaining it otherwise.