Im also have this problem
(Reading database ... 317555 files and directories currently installed.)
Preparing to unpack .../nepomuk-core-data_4%3a4.13.90-0ubuntu1_all.deb ...
Unpacking nepomuk-core-data (4:4.13.90-0ubuntu1) over (4:4.13.0-0ubuntu1) ...
dpkg: error processing archive
** Tags removed: need-duplicate-check
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Bugs, which is subscribed to nepomuk-core in Ubuntu.
https://bugs.launchpad.net/bugs/1346445
Title:
package nepomuk-core-data 4:4.13.90-0ubuntu1 failed to
install/upgrade: trying
