Upgrade Path for an old docker deployment (21 -> ?)

Hi,

We are running an old but small grafana/horizon/psql stack that we launched inside Docker Containers - 3 containers.

It is currently running Horizon 21.

I was able to upgrade the psql server and DB from 9.6 to 13.1 and grafana from 4.x to 7.3.4, along with OpenNMS Helm plugin from 1.0.0 to 6.0.0.

I was able to use the “new” docker hub repo and update to 21.0.5 Horizon image, but if I try to set whatever newer image it will fail.

This updated stack still works, and I am happy the deployment points to available images, just wondering if there was a (rather simple) path for getting horizon to a newer version.