Preparing to unpack .../albatross-gtk-theme_1.7.3-0ubuntu2_all.deb ...
Unpacking albatross-gtk-theme (1.7.3-0ubuntu2) ...
dpkg: error processing archive /var/cache/apt/archives/albatross-gtk-theme_1.7.3-0ubuntu2_all.deb (--unpack):
 trying to overwrite '/usr/share/themes/Albatross/gtk-3.0/assets/radio-selected.png', which is also in package shimmer-themes 1.7.3-0ubuntu1
Selecting previously unselected package bluebird-gtk-theme.
Preparing to unpack .../bluebird-gtk-theme_1.7.3-0ubuntu2_all.deb ...
Unpacking bluebird-gtk-theme (1.7.3-0ubuntu2) ...
dpkg: error processing archive /var/cache/apt/archives/bluebird-gtk-theme_1.7.3-0ubuntu2_all.deb (--unpack):
 trying to overwrite '/usr/share/themes/Bluebird/gtk-3.0/assets/radio-selected.png', which is also in package shimmer-themes 1.7.3-0ubuntu1
Selecting previously unselected package greybird-gtk-theme.
Preparing to unpack .../greybird-gtk-theme_1.7.3-0ubuntu2_all.deb ...
Unpacking greybird-gtk-theme (1.7.3-0ubuntu2) ...
dpkg: error processing archive /var/cache/apt/archives/greybird-gtk-theme_1.7.3-0ubuntu2_all.deb (--unpack):
 trying to overwrite '/usr/share/themes/Greybird-compact/xfwm4/hide-active.png', which is also in package shimmer-themes 1.7.3-0ubuntu1