не удалось обновить imagemagick

Я запускаю Ubuntu 16.04 и не удаюсь обновить imagemagick. Следующее производится от aptitude команда, которая дает больше информации, чем apt-get.

Accept this solution? [Y/n/q/?] Y
The following packages will be upgraded:
  imagemagick-6.q16 
The following partially installed packages will be configured:
  imagemagick 
1 packages upgraded, 0 newly installed, 0 to remove and 22 not upgraded.
Need to get 0 B/387 kB of archives. After unpacking 0 B will be used.
Do you want to continue? [Y/n/?] Y
(Reading database ... 543355 files and directories currently installed.)
Preparing to unpack .../imagemagick-6.q16_8%3a6.8.9.9-7ubuntu5.6_amd64.deb ...
Unpacking imagemagick-6.q16 (8:6.8.9.9-7ubuntu5.6) over (8:6.8.9.9-7ubuntu5.3) ...
dpkg: error processing archive /var/cache/apt/archives/imagemagick-6.q16_8%3a6.8.9.9-7ubuntu5.6_amd64.deb (--unpack):
 unable to make backup link of './usr/lib/x86_64-linux-gnu/ImageMagick-6.8.9/bin-Q16/import' before installing new version: Invalid cross-device link
dpkg-deb: error: subprocess paste was killed by signal (Broken pipe)
Errors were encountered while processing:
 /var/cache/apt/archives/imagemagick-6.q16_8%3a6.8.9.9-7ubuntu5.6_amd64.deb

И это - разрешение файла:

ls -lah /usr/lib/x86_64-linux-gnu/ImageMagick-6.8.9/bin-Q16/import
crw-rw-rw- 1 root root 1, 3 Mar 31 09:41 /usr/lib/x86_64-linux-gnu/ImageMagick-6.8.9/bin-Q16/import

Вопросы:

Почему import a c тип устройства? И как я обновляю imagemagick в этом случае?