Unpacking replacement libgtk-3-common ...
Preparing to replace courier-authlib-mysql 0.63.0-3.1ubuntu1 (using .../courier-authlib-mysql_0.63.0-4build1_amd64.deb) ...
/var/run/courier/authdaemon/pid.lock: No such file or directory
dpkg: warning: subprocess old pre-removal script returned error exit status 1
dpkg - trying script from the new package instead ...
/var/run/courier/authdaemon/pid.lock: No such file or directory
dpkg: error processing /var/cache/apt/archives/courier-authlib-mysql_0.63.0-4build1_amd64.deb (--unpack):
 subprocess new pre-removal script returned error exit status 1