---
title: De-duplicating existing configuration items
description: Whenever configuration items \(CIs\) are updated through a deduplication task, the discovered items \(DIs\) that are related to those CIs are also updated. The vulnerable items \(VIs\) and detections are also updated with the CI.
locale: en-US
canonical_url: https://www.servicenow.com/docs/r/australia/security-management/vulnerability-response/reapply-deduplication.html
release: australia
product: Vulnerability Response
classification: vulnerability-response
topic_type: concept
last_updated: "2026-03-12"
reading_time_minutes: 1
breadcrumb: [Working with unmatched CIs, Vulnerability Response remediation overview, Vulnerability Response, Unified Security Exposure Management, Security Operations]
---

# De-duplicating existing configuration items

Whenever configuration items \(CIs\) are updated through a deduplication task, the discovered items \(DIs\) that are related to those CIs are also updated. The vulnerable items \(VIs\) and detections are also updated with the CI.

For more information, see [CI changes for discovered items](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/security-management/vulnerability-response/reapply-discovered-items-ci-changes.md).

**Parent Topic:**[Working with unmatched CIs](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/security-management/vulnerability-response/working-unmatched-cis.md)

**Related topics**  


[View and reclassify unmatched configuration items]()

[Reconcile unmatched discovered items]()

[Steps to help prevent duplicate or orphaned records after running Vulnerability Response CI lookup rules]()

[Resolve remediation tasks]()

[Remediate a de-duplication task](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/servicenow-platform/reconcile-dup-task.md)