i am getting this errot
Challenge Not yet complete... here's what's wrong:
Closing a Maintenance Request of type 'Routine Maintenance' or 'Repair' did not create of a new Maintenance Request with the correct due date. The challenge is expecting the due date to be calculated using the maintenance cycle defined on the related equipment records. If multiple equipments are used in the maintenance request, choose the shortest maintenance cycle to define the service date.
Close errors

Trigger handler
public with sharing class MaintenanceRequestHelper {
    
    public static void updateWorkOrders(list<Case> Cases) {
        
        Map<Id,Case> caseLst = new Map<Id,Case>();
        for(Case c:Cases){
            if (c.IsClosed && (c.Type.equals('Repair') || c.Type.equals('Routine Maintenance'))){
                caseLst.put(c.Id,c);
            }
        }
        
        
        Map<Id, Integer> mapProduct = new Map<Id, Integer>(); 
           List<Case> CaseList = new List<Case>();
        
        List<Product2> listProduct = [select Id, Maintenance_Cycle__c from Product2];                                   
        for (Product2 p : listProduct) {
            if (p != null) {
                if(p.Maintenance_Cycle__c != null){
                    mapProduct.put(p.Id, Integer.valueOf(p.Maintenance_Cycle__c));
                }               
            }
        }

        for(Case a: caseLst.values()){
            Case newCase = new Case();
            newCase.Vehicle__c = a.Vehicle__c;
            newCase.Equipment__c = a.Equipment__c;
            newCase.Type = 'Routine Maintenance';
            newCase.Subject = String.isBlank(a.Subject) ? 'Routine Maintenance Request' : a.Subject;
            newCase.Date_Reported__c = Date.today();
            newCase.Status = 'New';
            newCase.Product__c = a.Product__c;
            newCase.AccountId = a.AccountId;
            newCase.ContactId = a.ContactId;
            newCase.AssetId = a.AssetId;
            newCase.Origin = a.Origin;
            newCase.Reason = a.Reason;
            newCase.Date_Due__c =  (mapProduct.get(a.Id) != null) ? (Date.today().addDays(Integer.valueOf(mapProduct.get(a.Id)))) : (Date.today());
            CaseList.add(newCase);
        }
        if(CaseList.size() > 0){
            insert CaseList;
        }
    }        
    
}

Trigger
trigger MaintenanceRequest on Case (before update, after update) {
    
    if(Trigger.isUpdate  && Trigger.isAfter){
        MaintenanceRequestHelper.updateWorkOrders(Trigger.new);
    }
}