HealthCloudGA__No_Duplicates

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Validation rule Details
Name HealthCloudGA__No_Duplicates
Label HealthCloudGA__No_Duplicates
Object Visit
Active Yes
Formula
AND( OR( ISNEW(), ISCHANGED( Name )), NOT( ISBLANK (VLOOKUP( $ObjectType.HealthCloudGA__FilterCriterion__c.Fields.Name ,  $ObjectType.HealthCloudGA__FilterCriterion__c.Fields.Name ,  Name ))))
Error message Another filter list already uses this name. Select a unique name.
Error location Name