NServiceBus/NServiceBus — comment on commit 44f79a38a54aebfcfe7d3bc070fd90cce523b884
File: src/impl/SagaPersisters/RavenSagaPersister/NServiceBus.SagaPersisters.Raven/RavenSagaPersister.cs line 69
By udidahan:

Theoretically, no - there could be more than one unique property. In practice, I think one is enough. However, we'd need to put in some code to throw an exception saying that more than one unique property isn't supported.