IntegrityError when clearing request log with in-flight request

[c-w]

I occasionally see FOREIGN KEY constraint failed errors coming from silk; my hypothesis is that it's caused by the following race condition:

1. a request comes into django
2. silk creates a Request record
3. silk_clear_request_log runs, deleting all Request records
4. django is done with the request
5. silk tries to insert a Response record referencing the Request record from step 2
6. IntegrityError is raised as step 3 deleted the Request that the Response is referencing

For now, I'm working around the issue with my own cleanup command that skips deleting any in-flight requests, but perhaps it's something that could be handled directly by silk_clear_request_log?