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Create a unique Name field in salesforce Custom Objects.

Validation Rule Error Condition Formula:
Name = VLOOKUP ( $ObjectType.Config_Info__c.Fields.Name , $ObjectType.Config_Info__c.Fields.Name, Name ) && Id <> VLOOKUP( $ObjectType.Config_Info__c.Fields.Id , $ObjectType.Config_Info__c.Fields.Name, Name )

Error Message:
Object Name must be unique



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