The command doesn't do anything in the HB fan driver. Go to your HB device and click on "Cycle Speed". it it will set it to low. Hit it again and it will stay set to low. It doesn't matter how many times you "Cycle Speed" it will always be on low.
Here are the logs from the HB fan controller when you issue the Cycle Speed command that is built into the fan driver.
It appears that whatever app is issuing the command to the HB fan controller is not issuing a cycleSpeed command but is instead issues a setSpeed command, which is not the same thing.
Only when issuing a setSpeed to Medium-High do I get this error:
So, as I said, to remove that, you would have to remove the medium-high speed from the capability.