Ubuntu Output on Certbot & mysql update

root@neville-clients:~# apt-get install --only-upgrade certbot
E: dpkg was interrupted, you must manually run 'dpkg --configure -a' to correct the problem. 
root@neville-clients:~# sudo dpkg --configure -a
Setting up linux-headers-4.4.0-151 (4.4.0-151.178) ...
Setting up linux-modules-4.4.0-151-generic (4.4.0-151.178) ...
Setting up linux-image-4.4.0-151-generic (4.4.0-151.178) ...
I: /vmlinuz.old is now a symlink to boot/vmlinuz-4.4.0-150-generic
I: /initrd.img.old is now a symlink to boot/initrd.img-4.4.0-150-generic
I: /vmlinuz is now a symlink to boot/vmlinuz-4.4.0-151-generic
I: /initrd.img is now a symlink to boot/initrd.img-4.4.0-151-generic
Setting up libsqlite3-0:amd64 (3.11.0-1ubuntu1.2) ...
Setting up mysql-server-5.7 (5.7.26-0ubuntu0.16.04.1) ...
ps aux | grep mysql
^Cdpkg: error processing package mysql-server-5.7 (--configure):
 subprocess installed post-installation script was interrupted
Setting up linux-headers-4.4.0-151-generic (4.4.0-151.178) ...
Setting up linux-headers-generic (4.4.0.151.159) ...
dpkg: dependency problems prevent configuration of mysql-server:
 mysql-server depends on mysql-server-5.7; however:
  Package mysql-server-5.7 is not configured yet.

dpkg: error processing package mysql-server (--configure):
 dependency problems - leaving unconfigured
Setting up linux-image-virtual (4.4.0.151.159) ...
Setting up linux-headers-virtual (4.4.0.151.159) ...
Setting up linux-virtual (4.4.0.151.159) ...
Processing triggers for linux-image-4.4.0-151-generic (4.4.0-151.178) ...
/etc/kernel/postinst.d/initramfs-tools:
update-initramfs: Generating /boot/initrd.img-4.4.0-151-generic
W: mdadm: /etc/mdadm/mdadm.conf defines no arrays.
/etc/kernel/postinst.d/zz-update-grub:
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-4.4.0-151-generic
Found initrd image: /boot/initrd.img-4.4.0-151-generic
Found linux image: /boot/vmlinuz-4.4.0-150-generic
Found initrd image: /boot/initrd.img-4.4.0-150-generic
Found linux image: /boot/vmlinuz-4.4.0-148-generic
Found initrd image: /boot/initrd.img-4.4.0-148-generic
Found linux image: /boot/vmlinuz-4.4.0-97-generic
Found initrd image: /boot/initrd.img-4.4.0-97-generic
Found linux image: /boot/vmlinuz-4.4.0-96-generic
Found initrd image: /boot/initrd.img-4.4.0-96-generic
Found linux image: /boot/vmlinuz-4.4.0-93-generic
Found initrd image: /boot/initrd.img-4.4.0-93-generic
Found linux image: /boot/vmlinuz-4.4.0-87-generic
Found initrd image: /boot/initrd.img-4.4.0-87-generic
done
Processing triggers for libc-bin (2.23-0ubuntu10) ...
Errors were encountered while processing:
 mysql-server-5.7
 mysql-server
root@neville-clients:~#