Currently if Clair returns errors Quay will delete the security
status for that manifest, meaning it will revert to a "Queued"
status and needs to be reindexed. This in-turn means that the
functionality is not immediately recovered when Clair becomes
healthy.

It is also generally a bad idea (except in specific
use-cases to have a data modification in a read path).

Relevant code:

https://github.com/quay/quay/blob/master/data/secscan_model/secscan_v4_model.py#L136-L165