$ LANGUAGE=C sudo apt full-upgrade 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Calculating upgrade... Done
The following packages will be upgraded:
  libpam-kwallet4
1 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/10,3 kB of archives.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [T/n] T
(Reading database ... 270944 files and directories currently installed.)
Preparing to unpack .../libpam-kwallet4_4%3a5.5.3-0ubuntu1~ubuntu16.04~ppa2_amd64.deb ...
Unpacking libpam-kwallet4 (4:5.5.3-0ubuntu1~ubuntu16.04~ppa2) over (4:5.5.3-0ubuntu1~ubuntu16.04~ppa1) ...
dpkg: error processing archive /var/cache/apt/archives/libpam-kwallet4_4%3a5.5.3-0ubuntu1~ubuntu16.04~ppa2_amd64.deb (--unpack):
 trying to overwrite '/lib/x86_64-linux-gnu/security/pam_kwallet.so', which is also in package pam-kwallet4 4:5.4.3-0ubuntu1
Errors were encountered while processing:
 /var/cache/apt/archives/libpam-kwallet4_4%3a5.5.3-0ubuntu1~ubuntu16.04~ppa2_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)