sudo apt-get install emacs27-common
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
  emacs-bin-common emacs-common emacs-el emacs-gtk
Use 'sudo apt autoremove' to remove them.
The following NEW packages will be installed:
  emacs27-common
0 upgraded, 1 newly installed, 0 to remove and 28 not upgraded.
1 not fully installed or removed.
Need to get 0 B/18.2 MB of archives.
After this operation, 74.0 MB of additional disk space will be used.
(Reading database ... 418534 files and directories currently installed.)
Preparing to unpack .../emacs27-common_27.1~1.git86d8d76aa3-kk2+20.04_all.deb ...
Unpacking emacs27-common (27.1~1.git86d8d76aa3-kk2+20.04) ...
dpkg: error processing archive /var/cache/apt/archives/emacs27-common_27.1~1.git86d8d76aa3-kk2+20.04_all.deb (--unpack):
 trying to overwrite '/usr/include/emacs-module.h', which is also in package emacs-common 1:26.3+1-1ubuntu2
dpkg-deb: error: paste subprocess was killed by signal (Broken pipe)
Errors were encountered while processing:
 /var/cache/apt/archives/emacs27-common_27.1~1.git86d8d76aa3-kk2+20.04_all.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)