Unknown OS type Linux.5.0.0-15-generic

Recently I have upgraded Ubuntu 18.04 to Ubuntu 19.04. After the completion of the upgrade, I get the following error when I open the terminal

Warning: unknown OS type Linux.5.0.0-15-generic

Although this is not affecting me from doing work using the terminal, I would like to know why this warning shows.

The output of a few commands:

cat /etc/os-release

NAME="Ubuntu"
VERSION="19.04 (Disco Dingo)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 19.04"
VERSION_ID="19.04"
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
VERSION_CODENAME=disco
UBUNTU_CODENAME=disco

hostnamectl

   Static hostname: envy
   Icon name: computer-laptop
   Chassis: laptop
   Machine ID: 404b7c62fbba444287a5256a4604788c
   Boot ID: 9a3d75b8a927419d87c4957335ab2a1e
   Operating System: Ubuntu 19.04
   Kernel: Linux 5.0.0-15-generic
   Architecture: x86-64

lsb_release -a

No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 19.04
Release:    19.04
Codename:   disco

uname -r

5.0.0-15-generic