---
title: 'Duplicate Check & Sync'
url: 'https://docs.brix.ch/celum_extensions/duplicate_check'
markdown: 'https://docs.brix.ch/celum_extensions/duplicate_check.md'
lang: en
date: '2026-10-26'
description: 'Technical documentation for the CELUM Extension "Duplicate Check & Sync" – Software developed by brix'
taxonomy:
  category:
    - docs
---

[](#) 

  [ Welcome ](https://docs.brix.ch/)     [ CELUM Extensions ](https://docs.brix.ch/celum_extensions)      Duplicate Check & Sync    

# Duplicate Check & Sync

![Advanced-UI](https://img.shields.io/static/v1?label=UI&message=Advanced&color=lightgrey)![NOVA-UI](https://img.shields.io/static/v1?label=UI&message=NOVA&color=blue)

The "Duplicate Check" plugin provides viewing and editing of all duplicate assets in Celum.

## Properties

To be configured in {home}/appserver/conf/custom.properties

##### duplicateCheck.license

> type: String, **required: yes**, default: -

The license key for the plugin (product: duplicateCheck), provided by brix.

##### duplicateCheck.nodeTypeBlacklist

> type: List of Long, required: no, default: -

List of node type IDs to exclude from the node row display. Useful for hiding nodes assigned via infofields. Note: Assets in the Trashbin are not considered duplicates and don’t need to be configured here.

##### duplicateCheck.pageSize=

> type: Integer, **required: yes**, default: 25

Number of duplicate groups to display per page.

##### duplicateCheck.visibleForGroup=

> type: List of Long, required: no, default: -

Restrict the use of the plugin to the defined usergroups (superadmins always see it in any case).

## Compatibility Matrix

| Duplicate Check 2.0 | CELUM (min. version) |
|---|---|
| 2.0 | 6.20.0 |

| Nova Plugin | CELUM (min. version) | Backend Plugin (min. version) |
|---|---|---|
| 1.1.0-6.20.0 | 6.20.0 | 2.0 |

## Screenshots

![Overview](https://docs.brix.ch/user/pages/01.celum_extensions/13.duplicate_check/groups-view.png)

![Detail View](https://docs.brix.ch/user/pages/01.celum_extensions/13.duplicate_check/detail-view.png)

## Release Notes

#### 2.0

> Released: 2025-11-20

- Initial Version

 [ ](https://docs.brix.ch/celum_extensions/metadata_mapper) [](https://docs.brix.ch/celum_extensions/duplicate_check/duplicate_check)

---

## Navigation

- Parent: [CELUM Extensions](https://docs.brix.ch/celum_extensions.md)
- Previous: [Metadata Mapper](https://docs.brix.ch/celum_extensions/metadata_mapper.md)
- Next: [Asset Approval](https://docs.brix.ch/celum_extensions/asset_approval.md)
- Children:
  - [(DEPRECATED) Duplicate Check & Sync](https://docs.brix.ch/celum_extensions/duplicate_check/duplicate_check.md)