When choosing File->Export Feeds and selecting a file which already exists, not only will the KDE file dialog warn of a file being overwritten, but Akregator itself will give you a second redundant warning. One warning (the KDE file dialog one) should be enough.
Git commit 35608defad929ebd3f70c173a6252ae3cb129b91 by Montel Laurent. Committed on 11/08/2017 at 04:59. Pushed by mlaurent into branch 'Applications/17.08'. Fix Bug 383380 - Duplicate overwrite warning when exporting feeds FIXED-IN: 5.6.1 M +0 -9 src/akregator_part.cpp https://commits.kde.org/akregator/35608defad929ebd3f70c173a6252ae3cb129b91