Update from HassOS 5.13 to HAOS 11.2

I’m currently running HassOS 5.13 on my Raspberry PI 4 and would like to update to the latest Home Assistant OS.

> ha os info command tells me that the latest version is 5.13

Running the following command leads to the following error.

> ha core update

Error: ‘HomeAssistantCore.update’ blocked from execution, system is not healthy - docker

My docker version is 19.03.15

Perhaps I should start by updating docker? How does that work since the OS doesn’t have a package manager like APK?