---
schema_version: "1"
id: 006ba2afcb0cb8a243b112cef3bb299787b3541f7505019eea0d0df9b2892cca
title: Changing Big Object Fields
collection: admin
version: current
locale: en-us
portal_url: https://docs.salesforce.com/admin/current/en-us/platform/264-0-0/custom_bo_changing_fields.md
canonical_url: https://help.salesforce.com/s/articleView?id=platform.custom_bo_changing_fields.htm&release=264.0.0&type=5
source_site: help.salesforce.com
content_type: documentation
content_hash: 42d232d6c6e941a55b58e755a7be41dd996f50aa5182d499cfae0b44742869d2
description: Learn how big object fields differ from standard object fields when you update or delete them. Make sure that your big object is correct before you save it.
products:
  - Salesforce Platform
  - Security
release: "264"
---
# Changing Big Object Fields

Learn how big object fields differ from standard object fields when you update or delete them. Make sure that your big object is correct before you save it.

## Updating Fields for Big Objects

If a field has an existing value, you can update it with a different value. You can’t update it with a NULL value. You can delete a record and recreate it if you want to change the value to NULL.

Most properties cause data mutation. You can’t change big object field properties that cause data mutation and you can’t edit the properties after you create an object. Properties that don’t cause data mutation are related to information about the data, such as labels or help text.

## Deleting Fields for Big Objects

You can’t delete an individual field after the object is created. So if you want to delete a field from a Big Object, delete the object and then recreate it.