解决UBUNTU16.04命令sudo apt-get update 报错Failed to fetch(亲测有效)

执行sudo apt-get update报错:ubuntu E: Failed to fetch http://ppa.launchpad.net/v-launchpad-jochen-sprickerhof-de/pcl/ubuntu/dists/xenial/main/binary-amd64/Packages  404  Not Found [IP: 91.189.95.83 80] E:
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