---
schema_version: "1"
id: 9f01ead0fccabe8713f775de03aee4fc374f09c4dfe2f14f4a0ba04725c0b3aa
title: Things to Know About Duplicate Jobs
collection: admin
version: current
locale: en-us
portal_url: https://docs.salesforce.com/admin/current/en-us/sales/264-0-0/duplicate_jobs_considerations.md
canonical_url: https://help.salesforce.com/s/articleView?id=sales.duplicate_jobs_considerations.htm&release=264.0.0&type=5
source_site: help.salesforce.com
content_type: documentation
content_hash: 5ef65e5702d6f629428c62919dd87e738bb814f1d39c2e09ccd0d4ff5375fd10
description: Review considerations for using duplicate jobs.
products:
  - Sales
  - Sales Enablement
release: "264"
---
# Things to Know About Duplicate Jobs

Review considerations for using duplicate jobs.

### Required Editions

<table class="slds-table slds-table_bordered slds-max-medium-table_stacked slds-m-bottom_small edition"><colgroup><col></colgroup><tbody><tr class=""><td class="slds-cell-wrap" style="vertical-align:top;">Available in: Lightning Experience and Salesforce Classic</td></tr><tr class=""><td class="slds-cell-wrap" style="vertical-align:top;">Available in: <strong>Performance</strong> and <strong>Unlimited</strong> Editions</td></tr></tbody></table>

Compare and Merge Not Supported for Custom Objects

You can run duplicate jobs on custom objects, but you can’t compare and merge duplicate records.

Job Limits

New jobs are blocked, or job results are deleted or overwritten, under the following circumstances.

- Creating a job with the same settings (object and matching rule) as a completed job overwrites the earlier job. We alert you before running the job to confirm.
- Suppose that you run a job, and then you edit the matching rule you used. When you run another job using the rule, we delete the results of the first job without alerting you.
- When the total number of duplicates in all completed jobs reaches 1,000,000, you can’t run new jobs. To run a job, delete the results of one or more jobs until the number of duplicate record items falls below 1,000,000.
- In an org with many records, duplicate jobs can fail.

When the results of a duplicate job are deleted, the information about the job is preserved: the number of records scanned, sets of duplicates found, and individual duplicates found.

Duplicate Record Sets and List Views

For each job you run, a list view of duplicate record sets is generated.

- If you delete the list view, the duplicate record sets and duplicate record items persist, and information about the job in Setup also persists.
- However, if you delete the job’s results in Setup, the corresponding list view, duplicate record sets, and duplicate record items are all deleted.

Required Custom Fields on Duplicate Record Set or Duplicate Record Item Layouts

When duplicate record sets or items in a set generated by a duplicate job contain required custom fields, the job fails.

Encrypted Fields Used for Matching

If a field included in a matching rule used for a duplicate job is encrypted, the job fails.