Newts installation is broken due to dependency issues on Debian

[10:34]root@fulitvm004:~# cat /etc/issue
Ubuntu 16.04.5 LTS \n \l

[10:34]root@fulitvm004:~# apt update
Hit:1 http://rmvm052.ad1.proemion.com/repo xenial InRelease
Hit:2 http://archive.ubuntu.com:80/ubuntu xenial InRelease               
Get:3 http://security.ubuntu.com/ubuntu xenial-security InRelease [107 kB]
Get:4 http://archive.ubuntu.com:80/ubuntu xenial-updates InRelease [109 kB]    
Get:5 http://archive.ubuntu.com:80/ubuntu xenial-backports InRelease [107 kB]
Ign:6 https://debian.datastax.com/community stable InRelease 
Hit:7 https://debian.datastax.com/community stable Release
Fetched 323 kB in 1s (265 kB/s)
Reading package lists... Done
Building dependency tree       
Reading state information... Done
All packages are up to date.
[10:34]root@fulitvm004:~# apt install dsc30
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 dsc30 : Depends: python-support (>= 0.90.0) but it is not installable
E: Unable to correct problems, you have held broken packages.