Preparing to replace libutouch-frame1 2.2.1-0ubuntu1 (using .../libutouch-frame1_2.2.2-0ubuntu1_amd64.deb) ...
Unpacking replacement libutouch-frame1 ...
Preparing to replace libutouch-grail1 3.0.2-0ubuntu1 (using .../libutouch-grail1_3.0.3-0ubuntu1_amd64.deb) ...
Unpacking replacement libutouch-grail1 ...
Selecting previously unselected package valac-0.16-vapi.
Unpacking valac-0.16-vapi (from .../valac-0.16-vapi_0.15.2-1_all.deb) ...
dpkg: error processing /var/cache/apt/archives/valac-0.16-vapi_0.15.2-1_all.deb (--unpack):
 trying to overwrite '/usr/share/vala-0.16/vapi/ccss-1.vapi', which is also in package valac-0.16 0.15.2-0ubuntu1