confusing message in dist-upgrade

[Pfiff]

What should I do with this message

Code:

sudo apt-get update && sudo apt-get dist-upgrade
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Es wurden 6.596 B in 1 s geholt (4.016 B/s).        
Paketlisten werden gelesen... Fertig
N: Skipping acquire of configured file 'main/binary-i386/Packages' as repository 'http://ds9-maui.s3-website.eu-central-1.amazonaws.com/maui-xenial-backports-neon xenial InRelease' doesn't support architecture 'i386'
Paketlisten werden gelesen... Fertig
Abhängigkeitsbaum wird aufgebaut.      
Statusinformationen werden eingelesen.... Fertig
Paketaktualisierung (Upgrade) wird berechnet... Fertig

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Thanks in advance!

Ciao!
Dieter