It’s serving the one I created, as I just replaced it again this afternoon. I created it myself and uploaded it to the server. The one that AIOSEO creates has overwritten mine at least 2 times. When it does, it has the autogenerated message at the top of the llms.txt file with the AIOSEO name.
I won’t upgrade the plugin as that just increases the variables of what the issue could be.
The toggle was saved to off a while back and confirmed it is still off.