I used both remove and purge.
Here are the logs:
Log started: 2016-06-25 20:19:23 (Reading database ... ^M(Reading database ... 5%^M(Reading database ... 10%^M(Reading database ... 15%^M(Reading database ... 20%^M(Reading database ... 25%^M(Reading database ... 30%^M(Reading database ... 35%^M(Reading database ... 40$ Preparing to unpack .../armv7-transmission-app-osmc_2.8.4-11_armhf.deb ... Unpacking armv7-transmission-app-osmc (2.8.4-11) ... dpkg: error processing archive /var/cache/apt/archives/armv7-transmission-app-osmc_2.8.4-11_armhf.deb (--unpack): trying to overwrite '/usr/share/transmission/web/images/favicon.png', which is also in package transmission-common 2.84-0.2 dpkg-deb: error: subprocess paste was killed by signal (Broken pipe) Errors were encountered while processing: /var/cache/apt/archives/armv7-transmission-app-osmc_2.8.4-11_armhf.deb Log ended: 2016-06-25 20:19:24
EDIT:
Found this thread, and managed to fix the installation.
How to close this thread?