package:mysql-server-5.7:5.7.19-0ubuntu0.16.04.1
Preparing to unpack .../mysql-server-5.7_5.7.20-0ubuntu0.16.04.1_amd64.deb ...
invoke-rc.d: dangling symlink: /etc/rc5.d/S03mysql
dpkg: warning: subprocess old pre-removal script returned error exit status 102
dpkg: trying script from the new package instead ...
invoke-rc.d: dangling symlink: /etc/rc5.d/S03mysql
dpkg: error processing archive /var/cache/apt/archives/mysql-server-5.7_5.7.20-0ubuntu0.16.04.1_amd64.deb (--unpack):
 subprocess new pre-removal script returned error exit status 102