Ubuntu更新软件提示404

Err:1 http://mirrors.aliyun.com/ubuntu xenial-security/main amd64 libgcrypt20 amd64 1.6.5-2ubuntu0.5
  404  Not Found
Err:1 http://mirrors.aliyun.com/ubuntu xenial-security/main amd64 libgcrypt20 amd64 1.6.5-2ubuntu0.5
  404  Not Found
E: Failed to fetch http://mirrors.aliyun.com/ubuntu/pool/main/libg/libgcrypt20/libgcrypt20_1.6.5-2ubuntu0.5_amd64.deb  404  Not Found


E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?


错误提示如上