Comment 7 for bug 1558331

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Michael Marley (mamarley) wrote : Re: After upgrading to apt 1.2.7 in Xenial, PPAs and most other third-party repositories become unusable with "The repository is insufficiently signed by key (weak digest)"

I know that the PPAs need new keys, but it is not obvious how to do that. After extensive searching, I still cannot figure out how to do that.