ERROR mount disk / error creating directory used as read only file system

[HARIHARAN]

unable ASSESS LOCATION. error mounting ,

ProblemType: Package
DistroRelease: Ubuntu 20.04
Package: extundelete (not installed)
ProcVersionSignature: Ubuntu 5.11.0-46.51~20.04.1-generic 5.11.22
Uname: Linux 5.11.0-46-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27.21
AptOrdering:
 extundelete:amd64: Install
 testdisk:amd64: Install
 NULL: ConfigurePending
Architecture: amd64
CasperMD5CheckResult: skip
Date: Tue Jan 18 08:59:02 2022
DpkgTerminalLog:
 Preparing to unpack .../extundelete_0.2.4-2build1_amd64.deb ...
 Unpacking extundelete (0.2.4-2build1) ...
 dpkg: error processing archive /var/cache/apt/archives/extundelete_0.2.4-2build1_amd64.deb (--unpack):
  unable to clean up mess surrounding './usr/bin/extundelete' before installing another version: Read-only file system
DuplicateSignature:
 package:extundelete:(not installed)
 Unpacking extundelete (0.2.4-2build1) ...
 dpkg: error processing archive /var/cache/apt/archives/extundelete_0.2.4-2build1_amd64.deb (--unpack):
  unable to clean up mess surrounding './usr/bin/extundelete' before installing another version: Read-only file system
ErrorMessage: unable to clean up mess surrounding './usr/bin/extundelete' before installing another version: Read-only file system
Python3Details: /usr/bin/python3.8, Python 3.8.10, python3-minimal, 3.8.2-0ubuntu2
PythonDetails: N/A
RelatedPackageVersions:
 dpkg 1.19.7ubuntu3
 apt 2.0.6
SourcePackage: extundelete
Title: package extundelete (not installed) failed to install/upgrade: unable to clean up mess surrounding './usr/bin/extundelete' before installing another version: Read-only file system
UpgradeStatus: No upgrade log present (probably fresh install)