OperationalError('interrupted') can 500 on row page

I got this on my (private) https://dogsheep.simonwillison.net/twitter/tweets/1188612004572880896 page:

<img width="1059" alt="Error_500" src="https://user-images.githubusercontent.com/9599/98895899-a6440980-245c-11eb-98e8-fb97d10ec2fd.png">
