Adding useRetention breaks Asp.net core application

I have added the elsa.useRetention() module to my API. When I try to run it, it starts up but once the retention policy kicks in say after 2 minutes for testing, the application will crash with the following error `The given key was not present in the dictionary`

Just add the example code and import the nuget packages https://docs.elsaworkflows.io/optimize/retention#configuration

elsa.UseRetention(r =>
{
r.SweepInterval = TimeSpan.FromMinutes(30);
r.AddDeletePolicy("Delete all finished workflows", _ => new RetentionWorkflowInstanceFilter()
{
WorkflowStatus = WorkflowStatus.Finished
});
});

4. **Reproduction Rate**: Indicate how often the bug occurs when following these steps (e.g., "every time", "intermittently: about 50% of the time").

every time

## Environment
Elsa 3.3.4