In Salesforce CRM, Duplicate Record Sets might not be created even when records meet the duplicate rule matching criteria. This behavior occurs if the fields included in the matching rule are not modified during the record creation or editing process.
Duplicate Record Sets are generated when a record matches the duplicate rule criteria upon creation or editing.
However, duplicate rules are only triggered when a change is detected in the fields defined in the Matching Criteria. Even with update operations using Data Loader, if the values of the matching fields (such as Account Name or Abbreviation) are not changed, the duplicate rule is not triggered, and a Duplicate Record Set is not created.
To force the creation of a Duplicate Record Set for existing records, perform the following steps:
By performing this operation, the Duplicate Rule is evaluated as part of the record editing process, and a Duplicate Record Set is created.
The Potential Duplicates component on the record page detects and displays records that may be duplicates of existing data, and its behavior differs from the creation of Duplicate Record Sets.
Duplicate rules: https://help.salesforce.com/s/articleView?id=sales.duplicate_rules_map_of_reference.htm&type=5
Matching Rules: https://help.salesforce.com/s/articleView?id=sales.matching_rule_map_of_reference.htm&type=5
005237351

We use three kinds of cookies on our websites: required, functional, and advertising. You can choose whether functional and advertising cookies apply. Click on the different cookie categories to find out more about each category and to change the default settings.
Privacy Statement
Required cookies are necessary for basic website functionality. Some examples include: session cookies needed to transmit the website, authentication cookies, and security cookies.
Functional cookies enhance functions, performance, and services on the website. Some examples include: cookies used to analyze site traffic, cookies used for market research, and cookies used to display advertising that is not directed to a particular individual.
Advertising cookies track activity across websites in order to understand a viewer’s interests, and direct them specific marketing. Some examples include: cookies used for remarketing, or interest-based advertising.