Translations: duplicate message definition

[xiota]

Running make in extras/translations of commit 212b0e3 produces the following error:

it.po:1716: duplicate message definition...
it.po:396: ...this is the location of the first definition
msgfmt: found 1 fatal error
make: *** [Makefile:22: it.mo] Error 1

[Narrat]

I was debating if it was due to a feature in the new gettext version (0.23 got released) or due to an error in translation files as I noticed the same error when trying to create a new package.
But it seems to be due to a change in the translation. For reference this is caused by b6f1288#diff-a4ce33929e58557cf64c605f51f1962bba0b693e5062b4cee3502ab99a22068a
Didn't check why it doesn't happen with other language files, but italian translation does have a plus of around ~200 lines, which is odd (caused by this weblate commit: 431f1c6 ).
@jaromil: is that something that needs to corrected via weblate, or does it need in general a new run of generate_translate_strings and those are uploaded to weblate?