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Can't update Plesk

Does that have anything to do with the problem?

N: Ignoring file 'plesk.list.ai_back' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension

W: Duplicate sources.list entry http://autoinstall.plesk.com/debian/PMM_0.1.10/ jessie/all amd64 Packages (/var/lib/apt/lists/autoinstall.plesk.com_debian_PMM%5f0.1.10_dists_jessie_all_binary-amd64_Packages)

W: You may want to run apt-get update to correct these problems
 
Hi CGI1979,

Does that have anything to do with the problem?
No, it doesn't and the mentioned "plesk.list.ai_back" is just a BACKUP - file from the Plesk autoinstaller ( = ai ). As you might have read, the notice ( = N: ) states clear, that the file will be ignored.

Even that the notice "Duplicate sources.list entry" is declared as a warning ( = W: ), it will not effect the "apt" - usage at all. ;)
 
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