(Reading database ... 292278 files and directories currently installed.)
Preparing to unpack .../ubuntucinnamon-lightdm-theme-base_20.07.2_all.deb ...
Unpacking ubuntucinnamon-lightdm-theme-base (20.07.2) ...
dpkg: error processing archive /var/cache/apt/archives/ubuntucinnamon-lightdm-th
eme-base_20.07.2_all.deb (--unpack):
 trying to overwrite '/etc/lightdm/lightdm.conf.d/50_cinnamon-desktop.conf', whi
ch is also in package ubuntucinnamon-environment 0.1.6-1
Errors were encountered while processing:
 /var/cache/apt/archives/ubuntucinnamon-lightdm-theme-base_20.07.2_all.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)