Venus GX tank sensor custom name

Hi there, I have two tank sensors connected to the Venus GX (most recent FW version 2.32). I am programming some logic with Node-Red. The Tank Sensor node tells me: "Multiple tank sensors were found with the same name. You can set a custom name for the device in Venus settings."

I looked through all the venus settings pages via Console on LAN - but nowhere found an option to change the device names of "Generic Tank Input (1)" or "... (2)".

Somebody has an advice?

Thx. in advance,
Th.