Cannot delete Utility Meter helper defined in configuration.yaml

For some time I have been monitoring my modem’s MB sent/received per hour using Utility Meter helpers defined in configuration.yaml. I decided to move it to the Utility Meter helper in the UI. The plan was to create it with the same name (letting the entity_id get the “_2” suffix), delete the old, and then rename the new. However, after deleting the old one from the configuration and restarting HA, it is still there and not marked as restored. I’m guessing it’s probably in the long-term statistics, and might sit around ‘forever’.

Does anybody know how to get rid of it?

Never mind - I should have waited a bit longer. The old ones magically disappeared (perhaps after the reset cycle passed?).