System shows unhashed kernel memory addresses via the console

During boot I receive this notice:

This system shows unhashed kernel memory addresses via the console, logs, and other interfaces. This might reduce the security of your system.

This post on the gentoo forums leads me to believe that I have somewhere turned the SLUB_DEBUG kernel parameter on

https://forums.gentoo.org/viewtopic-t-1145898-start-0.html

But when I check my kernel parameters with sudo sysctl -a I don’t see the SLUB_DEBUG parameter anywhere.

What should I do and how do I hash the kernel addresses to fix the security flaw?

Sorry, I found where I enabled debugging.

I had slub_debug=FZ in grub, I removed the parameter.
Thank you

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