Salesforce Change Set deployments do not support enabling Field History Tracking on object fields. If you attempt to deploy Field History Tracking via a Change Set, the deployment will not activate field history tracking in the target org.
However, you can enable Field History Tracking programmatically using the Salesforce Metadata API with tools such as:
Field History Tracking is controlled by the trackHistory metadata attribute in the custom field definition XML.
How to Enable Field History Tracking Using the Metadata API
To enable Field History Tracking on a field, set the trackHistory element to true in your field's XML metadata definition.
<?xml version="1.0" encoding="UTF-8"?>
<CustomObject xmlns="http://soap.sforce.com/2006/04/metadata">
<fields>
<fullName>MyCustomAccountField__c</fullName>
<description>A custom field on the Account standard object.</description>
<externalId>false</externalId>
<inlineHelpText>Some help text.</inlineHelpText>
<label>MyCustomAccountField</label>
<length>100</length>
<required>false</required>
<trackFeedHistory>false</trackFeedHistory>
<trackHistory>true</trackHistory>
<type>Text</type>
<unique>false</unique>
</fields>
</CustomObject>
Deploy this metadata file using ANT Migration Tool or Salesforce CLI via VS Code to the target org. The trackHistory attribute is what enables the history tracking functionality.
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