---
title: Component Id Must Be Unique
description: "Impact Area Scalability Severity High Affected Element Apex Page ## Rule ID **SF-0122** ## Impact Your code can break if you use non-unique component ids and your page hierarchy changes. ## Remediation Make sure that you use ids which are…"
url: "https://community-staging.qualityclouds.com/qcdocs/qc/salesforce-rules/component-id-must-be-unique/"
updated: "2025-03-21"
category: Rules
---

# Component Id Must Be Unique

Impact Area

Scalability

Severity

High

           Affected Element

Apex Page

## Rule ID

**SF-0122**

## Impact

Your code can break if you use non-unique component ids and your page hierarchy changes.

## Remediation

Make sure that you use ids which are unique at the whole page level.

### Time to fix

30 min

## References

See the Salesforce documentation article: [Best Practices for Accessing Component IDs](https://developer.salesforce.com/docs/atlas.en-us.pages.meta/pages/pages_best_practices_accessing_id.htm).