duplicate entries in CoolingChannelSuperMouse.set_cooling_channel_tag
On preprodcdb, I've loaded a single tag multiple times. The result is that when I read CoolingChannelSuperMouse.get_cooling_channel_for_tag,
I will see everything twice. This should not be allowed to happen.
It would be better, if there are multiple writes to the cdb, that they are versioned and CoolingChannelSuperMouse.get_cooling_channel_for_tag
defaults to the latest version. I suspect this means that a version number must be an argument to this function.