Some wrong with install 20.04 LTS

[Jerry Geis]

I am trying to do apt-install build-essential

and I get this
0 upgraded, 41 newly installed, 0 to remove and 0 not upgraded.
Need to get 1100 kB/45.4 MB of archives.
After this operation, 202 MB of additional disk space will be used.
Do you want to continue? [Y/n] Ign:1 http://archive.ubuntu.com/ubuntu
focal-updates/main amd64 linux-libc-dev amd64 5.4.0-125.141
Err:1 http://security.ubuntu.com/ubuntu focal-updates/main amd64
linux-libc-dev amd64 5.4.0-125.141
  404  Not Found [IP: 91.189.91.38 80]

Whats up ?

Jerry
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