root@armadillo:~/keibi/keibi# sudo apt -y install libssl-dev
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Suggested packages:
  libssl-doc
The following NEW packages will be installed:
  libssl-dev
0 upgraded, 1 newly installed, 0 to remove and 3 not upgraded.
Need to get 1598 kB of archives.
After this operation, 5425 kB of additional disk space will be used.
Err:1 http://security.debian.org buster/updates/main armhf libssl-dev armhf 1.1.1d-0+deb10u5
  404  Not Found [IP: 151.101.110.132 80]
E: Failed to fetch http://security.debian.org/pool/updates/main/o/openssl/libssl-dev_1.1.1d-0+deb10u5_armhf.deb  404  Not Found [IP: 151.101]
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?