Apt Key Expired in Ubuntu

I was updating my boxes as usual when I encountered an error when trying to run updates on my unifi controller. This lives on a slightly older box (I tried upgrading it at one point and not all the dependencies were supported yet on the newer version), and I ran into an error when running the apt commands. One of the keys was expired for a component needed by the controller. So lets figure out how to update that key so we can update the box once more.

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