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Error when creating Matching Rule: "We can't save this matching rule because it uses the [Object] lookup field [Object] without other Custom_Object__c fields

Knowledge Article Number 000213959
Description When trying to create a Matching Rule using a Lookup as Filter Criteria, you receive the Error:

We can't save this matching rule because it uses the [Object] lookup field [Object] without other Custom_Object__c fields, which returns poor match results and inhibits performance. Please add at least one Custom_Object__c field to the rule or modify the filter logic so the rule isn't matching on just [Object].
Resolution This is by design. You must use at least one other Field Filter Criteria when referencing a Lookup in Filter criteria.




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