Could not restore ‘/home/mark/.cache/deja-dup/metadata’: File not found in backup

as i am new to linux i hope im not wasting your time submitting this error.this happens on boot up of system every time so is it a bug i don't know.any helpful hints would be great.having come from using Microsoft i don't know why i didn't switch a long time ago.this is great.Many thanks in advance.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-docs 18.04.4
ProcVersionSignature: Ubuntu 5.3.0-46.38~18.04.1-generic 5.3.18
Uname: Linux 5.3.0-46-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.14
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Thu Apr 30 13:33:18 2020
InstallationDate: Installed on 2020-04-27 (2 days ago)
InstallationMedia: Ubuntu 18.04.4 LTS "Bionic Beaver" - Release amd64 (20200203.1)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: ubuntu-docs
UpgradeStatus: No upgrade log present (probably fresh install)