> Source: [sk139854](https://support.checkpoint.com/results/sk/sk139854)

# sk139854 - In SmartEvent policy, adding exclusion for sensor alert event by event id (e.g. id=20300) causes policy installation failure

| Property | Value |
|----------|-------|
| Solution ID | sk139854 |
| Date Created | 2018-11-07 |
| Last Modified | 2020-10-07 |
| Technical Level | Advanced |
| Products | Security Management Server |
| Versions | R82.10, R82, R81.20 |
| OS | Gaia |

## Symptoms

- When adding the following Sensor Alert exception (using the alert ID 20300) in SmartEvent policy ("Host Based Event" -\> "Sensor Alert" -\> "Exclude the following entries"), the SmartEvent policy installation fails with the error:  

`Installing policy for job [All online jobs]`  
`ERROR: Unknown field type - sensor_alert_id`  
`Error processing Ignore rule (problematic field - 'sensor_alert_id')`  
`Failed to build correlation policy for event 'Sensor Alert'`  
`Failed to buildJobDetectorsPolicy.`

## Solution

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