Reset ZHA smartplug not working

Hi.
Trying to follow this guide:
https://smarthomescene.com/guides/how-to-reset-smart-plugs-energy-total-in-zigbee2mqtt-and-zha/
to try to reset a Lumi smartplug.
The graphical settings used are:

but after th UI reports green upon execution of the action, the total remains unchanged:
image

Any help greatly appreciated.