[Secret and updating consensus key] fxcored tendermint update-validator doesnot work

hi guys, I’m a newbie here and setting up a new validator on test net.
During setting a full node with binaries.
When I’m heading to step to “Updating your consensus key and tagging it to a pin” I actually cannot execute the command because there is no “update-validator” command for “fxcored tendermint”.
you can see in my snipping, that it cannot run and return the help message.
Do you know how to do this step? thanks