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Hi everyone,

I'm facing a DUPLICATE_VALUE

error when inserting a new Opportunity in my test class. 

After investigation, I discovered that the issue comes from my @TestSetup method. However, there are

To reproduce the issue, I wrote the following test class, and I still get the error. However, if I comment out the insert statement in @TestSetup, everything works fine.

Has anyone encountered this behavior before? Why would Salesforce consider the record a duplicate, even when the data is different?

My only workaround was to delete all Opportunity records in my test method before recreating them, but I’d love to understand the root cause of this issue.

public class TestSetupInsert {
    public static Opportunity createHypothequeOpportunity(Id accountId){
        Opportunity opp = new Opportunity(
            StageName='En attente',
            CloseDate=Date.newInstance(2024, 12, 31),
            RecordTypeId='0127Q0000005LXLQA2',
            OwnerId='005TG000000Zlk2YAC',
            AccountId=accountId,
            Name='Test'
        );
        insert opp;
        return opp;
    }
}

@IsTest
public class TestSetupInsertTest {
    @TestSetup
	public static void setup(){
        Account acc = AccountFactory.createPersonAccount();
        // Hypothèque
        Opportunity oppHypotheque = OpportunityFactory.createHypothequeOpportunity(acc.Id);
        OpportunityLineItem oppProdHypotheque = OpportunityFactory.createOpportunityProductHypotheque(oppHypotheque.Id);
    }
    @IsTest
    public static void createHypothequeOpportunityTest() {
        Account acc = [SELECT Id FROM Account LIMIT 1];
        Test.startTest();
        Opportunity opp = TestSetupInsert.createHypothequeOpportunity(acc.Id);
        Test.stopTest();
        Opportunity newOpp = [SELECT Id, Name, RecordTypeId FROM Opportunity LIMIT 1];
        System.assertEquals('Test', newOpp.Name);
    }
}

Thanks in advance for any insights! 🚀