Fix key error for reverse zone (#6905) (#6906)
* Fix key error for reverse zone (#6905)
* Add changelog fragment for #6905
* Fix changelog (6905)
Co-authored-by: Felix Fontein <felix@fontein.de>
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Co-authored-by: Felix Fontein <felix@fontein.de>
(cherry picked from commit b818afd464)
Co-authored-by: irozet12 <119814380+irozet12@users.noreply.github.com>