(Reading database ... 288474 files and directories currently installed.)
Preparing to unpack .../plasma-desktop-data_4%3a5.6.4-0ubuntu1~ubuntu16.04~ppa3_all.deb ...
Unpacking plasma-desktop-data (4:5.6.4-0ubuntu1~ubuntu16.04~ppa3) over (4:5.5.5-0ubuntu1) ...
dpkg: error processing archive /var/cache/apt/archives/plasma-desktop-data_4%3a5.6.4-0ubuntu1~ubuntu16.04~ppa3_all.deb (--unpack):
 trying to overwrite '/usr/share/locale/pl/LC_MESSAGES/kcm_activities.mo', which is also in package kde-l10n-pl 4:15.12.3-0ubuntu1.2~ubuntu16.04~ppa1
dpkg-deb: error: subprocess paste was killed by signal (Broken pipe)
Errors were encountered while processing:
 /var/cache/apt/archives/plasma-desktop-data_4%3a5.6.4-0ubuntu1~ubuntu16.04~ppa3_all.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)