package open-iscsi (not installed) failed to install/upgrade: subprocess installed pre-removal script returned error exit status 1

I had installed open-iscsi package, but then had removed it as I did not need it later. I had stopped the iscsi service and also logged out from the iscsi drive completely. After restart now it has started giving this error.

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: open-iscsi (not installed)
ProcVersionSignature: Ubuntu 4.13.0-38.43~16.04.1-generic 4.13.16
Uname: Linux 4.13.0-38-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.15
AptOrdering:
 open-iscsi: Remove
 NULL: ConfigurePending
Architecture: amd64
Date: Wed Apr 4 17:12:59 2018
ErrorMessage: subprocess installed pre-removal script returned error exit status 1
InstallationDate: Installed on 2018-04-02 (2 days ago)
InstallationMedia: Ubuntu 16.04.4 LTS "Xenial Xerus" - Release amd64 (20180228)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.4
 apt 1.2.26
SourcePackage: open-iscsi
Title: package open-iscsi (not installed) failed to install/upgrade: subprocess installed pre-removal script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)