UniqueConstraintException when upserting

[lahiruchandima]

I have below data model.

@Indices({@Index(value = "synced", type = IndexType.NonUnique)})
public class Receipt implements Parcelable {
    @Id
    public String clientRef;
    public String dailySequence;
    public double discount;
    public double serviceCharge;
    public String steward;
    public ReceiptItem[] items;
    public boolean synced;

    // methods .....
}

And I save objects of this model to nitrite like below.

    receiptRepository = nitriteDb.getRepository(Receipt.class);

    public void persistReceipt(Receipt receipt) {
        receiptRepository.update(receipt, true);
    }

Infrequently, I get below exception when updating a receipt using above code. Note that I am upserting the receipt, and there is only a single unique key. So I am not expecting a unique constraint violation, even though the db already has a receipt with the same clientRef. If receipt already found, it should be updated because I specified to upsert.

Fatal Exception: org.dizitart.no2.exceptions.UniqueConstraintException: NO2.10003: unique key constraint violation for clientRef
       at org.dizitart.no2.internals.IndexingService.updateIndexEntry(IndexingService.java:126)
       at org.dizitart.no2.internals.DataService.insert(DataService.java:94)
       at org.dizitart.no2.internals.DataService.update(DataService.java:134)
       at org.dizitart.no2.internals.NitriteService.update(NitriteService.java:361)
       at org.dizitart.no2.internals.DefaultNitriteCollection.update(DefaultNitriteCollection.java:322)
       at org.dizitart.no2.objects.DefaultObjectRepository.update(DefaultObjectRepository.java:141)
       at org.dizitart.no2.objects.DefaultObjectRepository.update(DefaultObjectRepository.java:126)
       at com.lahiruchandima.pos.core.DatabaseHelper.persistReceipt(DatabaseHelper.java:483)
       at com.lahiruchandima.pos.core.ReceiptCacher.lambda$null$5$ReceiptCacher(ReceiptCacher.java:109)
       at com.lahiruchandima.pos.core.-$$Lambda$ReceiptCacher$FaO2Rq30Et4o2YAiQFhLGXUb3DI.run(lambda)
       at java.lang.Thread.run(Thread.java:776)

Can this be a bug in nitrite? Is there any workaround for this?

[anidotnet]

The fix is available in 3.4.0-SNAPSHOTS