How to fix GPG repository Error

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linux apt upgrade repository chrome-book

I'm using Linux on my chromebook and recently I removed it from the development environment and installed it back. After installation, I ran

apt update

but after a few seconds, it showed me this:

W: GPG error: https://storage.googleapis.com/cros-packages/89  buster Release: The following signatures were invalid: EXPKEYSIG 78BD65473CB3BD13 Google Inc. (Linux Packages Signing Authority) 
E: The repository 'https://storage.googleapis.com/cros-packages/89  buster Release' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

How do I fix this please?

Asked by Jefferson Chukwu (53 rep)

Dec 22, 2023, 01:47 PM
Last activity: Dec 22, 2023, 02:13 PM

How to fix GPG repository Error

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