Setting up push notifications - current_key and the Android key in the Credentials console are different

How to / Third Party Tooling
1

I am following this guide: Push notifications setup - Expo Documentation for how to setup push notifications for Android.

I am able to create a new project in Firebase and download the credentials so I now have a current_key.

The docs say

To be sure that both the current_key and the Android key in the Credentials console are the same, go to the Google Cloud API Credentials console and click on Show key to verify their value. It will be marked as unrestricted.

However, my current_key and the Android key in the Credentials console are NOT the same. I wonder if this is because my Android key was generated a couple of years ago when I first deployed my app from EAS to the Google Play store?