Hello Everyone,

Facing the below error in test class.

System.DmlException: Insert failed. First exception on row 0; first error: FIELD_INTEGRITY_EXCEPTION, field integrity exception: unknown (pricebook entry is in a different pricebook than the one assigned to the opportunity): [unknown]

Following is the piece of code:-
 public static testmethod void updateAccumulatedPriceTest()
    {
        Date closedDate=System.today()+1;
        Id accRecordTypeId =[SELECT id from RecordType where Name ='Partner VIP'].Id;
        
        //Creating Price book records
        List<Pricebook2> lstPriceBooks=new List<Pricebook2>();
        Pricebook2 objPriceBook=new Pricebook2(Name='VirtualCare',IsActive=true);
        lstPriceBooks.add(objPriceBook);
        insert lstPriceBooks;
        
        //Fetching system standard price book
        Pricebook2 standardPB = [select id from Pricebook2 where isStandard=true];
        
        //Creating an Account records
        List<account> lstAccs=new List<account>();
        Account objAcc=new Account(Name='Test Account',Envios_Automaticos__c=false,Tarifa_Acumulado__c=objPriceBook.Id,
                                   Contact_email__c='dummy@email11.com',RecordTypeId=accRecordTypeId);
        lstAccs.add(objAcc);
        insert lstAccs;
        
        
        //Creating Product records
        List<Product2> lstProducts=new List<Product2>();
        Product2 objProd=new Product2(Name='Product',isActive=true);
        lstProducts.add(objProd);
        insert lstProducts;
        
        

        //Creating the list the opportunities
       List<Opportunity> lstOpps=new List<Opportunity>();
        Id oppRecordTypeId =[SELECT id from RecordType where Name ='Orders'].Id;
        Opportunity objOpp=new Opportunity(Name='Opportunity1',StageName='Prospecting',CloseDate=closedDate,AccountId=lstAccs[0].Id,Pricebook2Id = objPriceBook.Id,
                                          RecordTypeId=oppRecordTypeId,Viene_de__c=lstAccs[0].Id,Email_de_Contacto__c='dummyOpp@email.com',
                                          Codigo_Postal_de_Envio__c='tesage',Calle_de_Envio__c='tesst',Contacto_Destinatario_Mens__c='cpntacto',
                                          Ciudad_de_Envio__c='ciudad',Pais_de_Envio__c='Pais',Provincia_de_Envio__c='provincia',Telefono__c='1244556677',
                                          Email_Destinatario_Mens__c='dummyOpp1@email.com');
               
        insert objOpp;
    system.debug('***objOpp***'+objOpp.Pricebook2Id);
    //Creating PriceBookEntry Records
        List<PricebookEntry> lstPriceBookEntry=new List<PricebookEntry>();
        PricebookEntry standardPrice = new PricebookEntry(Pricebook2Id = standardPB.Id, Product2Id = objProd.Id, UnitPrice = 10000, IsActive = true, UseStandardPrice = false);
        lstPriceBookEntry.add(standardPrice);
        
        PricebookEntry pbe = new PricebookEntry(Pricebook2Id=objOpp.Pricebook2Id,Product2Id = objProd.Id, UnitPrice = 10000, IsActive = true, UseStandardPrice = false);
        lstPriceBookEntry.add(pbe); 
     insert lstPriceBookEntry;
    
        PriceBookEntry pbe2=[select Id, name,Pricebook2Id from Pricebookentry WHERE Pricebook2Id=:objOpp.pricebook2Id];
        system.debug('***pbe2.Id***'+pbe2.Pricebook2Id);
        
        //Creating Opportunity Line Item records
        List<OpportunityLineItem> lstOppItems=new List<OpportunityLineItem>();
        OpportunityLineItem objLineItem=new OpportunityLineItem(OpportunityId=objOpp.Id,Quantity=2,UnitPrice = 7500,PriceBookEntryId=pbe2.Id,Description = '2007 CMR #4 - Anti-Infectives');
        lstOppItems.add(objLineItem);
        
        if(!lstOppItems.isEmpty())
        {
           insert lstOppItems;  
            
        }  
    }

The pricebookId is same and verified using debug statements.Still I am facing the above mentioned error.

Any help would be appreciated.

Thanks & Regards,
Harsha BR