---
title: ECS breaking changes
description: Breaking changes can impact your Elastic applications, potentially disrupting normal operations. Before you upgrade, carefully review the ECS breaking...
url: https://www.elastic.co/elastic/docs-builder/docs/3028/release-notes/ecs/breaking-changes
products:
  - Elastic Common Schema (ECS)
---

# ECS breaking changes
Breaking changes can impact your Elastic applications, potentially disrupting normal operations.
Before you upgrade, carefully review the ECS breaking changes and take the necessary steps to mitigate any issues.

## 9.0.0

<dropdown title="Remove previously deprecated fields">
  We've removed fields that were marked as deprecated in the previous major version of ECS.The removed fields are: `process.parent.pgid`, `process.pgid`, `service.node.role`,
  `service.origin.node.role`, `service.target.node.role`.For more information, check [#2410](https://github.com/elastic/ecs/pull/2410).
</dropdown>