---
sourceDocument: Brazil IT Service Management
sourceDocumentLink: https://www.servicenow.com/docs/r/it-service-management

 Release :

    - brazil

ft:locale :

    - en-US

ft:publication_title :

    - Brazil IT Service Management

ft:clusterId :

    - itsm

bundleId :

    - itsm

workflow :

    - Technology


---

# Limit conflict detection to a change model state

# Limit conflict detection to a change model state {#ariaid-title1}

Release version: Brazil  
Updated September 10, 2026  
![](https://www.servicenow.com/docs/portal-asset/ico-clock) 1 minute to read  
Use the Allow Conflict Detection attribute to limit conflict detection to a specific change model state. Conflict detection then runs only when a change request reaches that state.

## Before you begin

You must have a change model configured with at least one state.

Role required: admin

## About this task

Without the Allow Conflict Detection attribute, conflict detection runs whenever the state, the configuration item, or the planned start or end date of a change request changes, in any state. Adding the
attribute to a single state narrows conflict detection to that state, so it does not run in earlier or later states.

## Procedure

1. Navigate to AllChangeChange Models.
2. Open the change model to configure.  
   For example, open the Emergency change model.
3. On the Model States tab, open the state in which conflict detection runs.  
   The related list shows each state with its State label, whether it is the Initial state, and its Sequence.
4. On the Attributes tab, select New.
5. In the Attribute field, select Allow Conflict Detection.
6. Select the Active check box.
7. Select Submit.
**Related concepts**   

* [Change lockdown conflict detection](https://www.servicenow.com/docs/_t6mLdu9nC8reB5lPdjF~Q "Conflict detection checks change requests against active lockdown records in the same run that checks maintenance windows and blackout windows. A change request that falls inside a lockdown period is reported as a conflict and automatically placed on hold.")

*[\>]: and then