I have a class in production with 51% code coverage, so in the sandbox I rewrote the test class to improve the coverage to 96%. 
When I try to deploy that updated test class to production i get the following error and I am in great need of some help.

TestZebraScoreController.testClass(), Details: System.DmlException: Insert failed. First exception on row 0; first error: FIELD_CUSTOM_VALIDATION_EXCEPTION, Duplicate name found: [] Class.TestZebraScoreController.testClass: line 64, column 1

Here is my test class that I am deploying.

public class TestZebraScoreController {
  @isTest
  private static void testClass(){
    Account acc = new Account(Name='test');
    insert acc;
    List<Zebra_Label_and_Tooltip__c > listZLT = new List<Zebra_Label_and_Tooltip__c>();
    Zebra_Label_and_Tooltip__c zlat1 = new Zebra_Label_and_Tooltip__c();
    zlat1.Name = 'Access to Power';
    zlat1.Label_on_score_0__c = 'test';
    zlat1.Label_on_score_4__c = 'test';
    zlat1.Tooltip_on_score_0__c = 'test';
    zlat1.Tooltip_on_score_4__c = 'test';
    listZLT.add(zlat1);
    
    Zebra_Label_and_Tooltip__c zlat2 = new Zebra_Label_and_Tooltip__c();
    zlat2.Name = 'Company Profile';
    zlat2.Label_on_score_0__c = 'test';
    zlat2.Label_on_score_4__c = 'test';
    zlat2.Tooltip_on_score_0__c = 'test';
    zlat2.Tooltip_on_score_4__c = 'test';
    listZLT.add(zlat2);
    
    Zebra_Label_and_Tooltip__c zlat3 = new Zebra_Label_and_Tooltip__c();
    zlat3.Name = 'Funding';
    zlat3.Label_on_score_0__c = 'test';
    zlat3.Label_on_score_4__c = 'test';
    zlat3.Tooltip_on_score_0__c = 'test';
    zlat3.Tooltip_on_score_4__c = 'test';
    listZLT.add(zlat3);
    
    Zebra_Label_and_Tooltip__c zlat4 = new Zebra_Label_and_Tooltip__c();
    zlat4.Name = 'Operations';
    zlat4.Label_on_score_0__c = 'test';
    zlat4.Label_on_score_4__c = 'test';
    zlat4.Tooltip_on_score_0__c = 'test';
    zlat4.Tooltip_on_score_4__c = 'test';
    listZLT.add(zlat4);
    
    Zebra_Label_and_Tooltip__c zlat5 = new Zebra_Label_and_Tooltip__c();
    zlat5.Name = 'ROI';
    zlat5.Label_on_score_0__c = 'test';
    zlat5.Label_on_score_4__c = 'test';
    zlat5.Tooltip_on_score_0__c = 'test';
    zlat5.Tooltip_on_score_4__c = 'test';
    listZLT.add(zlat5);
    
    Zebra_Label_and_Tooltip__c zlat6 = new Zebra_Label_and_Tooltip__c();
    zlat6.Name = 'Service';
    zlat6.Label_on_score_0__c = 'test';
    zlat6.Label_on_score_4__c = 'test';
    zlat6.Tooltip_on_score_0__c = 'test';
    zlat6.Tooltip_on_score_4__c = 'test';
    listZLT.add(zlat6);
    
    Zebra_Label_and_Tooltip__c zlat7 = new Zebra_Label_and_Tooltip__c();
    zlat7.Name = 'Technology';
    zlat7.Label_on_score_0__c = 'test';
    zlat7.Label_on_score_4__c = 'test';
    zlat7.Tooltip_on_score_0__c = 'test';
    zlat7.Tooltip_on_score_4__c = 'test';
    listZLT.add(zlat7);
    
    
    insert listZLT;
    
    Opportunity opp = new Opportunity(Name='testopp', AccountId = acc.Id, StageName = 'IOA Completed', CloseDate = Date.today());
    insert opp;
    ApexPages.currentPage().getParameters().put('opportunityId', opp.Id);
    ZebraScoreController zsc = new ZebraScoreController();
    zsc.Save();
    zsc.Cancel();
  }
}