Received, tnx! Sadly, I can see nothing wrong here, all looks good and command should fail instead of executing :/
As a safety tip - try to run "masternode list-conf" first (should give you list of your nodes and their current status or at least what your local wallet think their status is).
If previous output matches your expectations - run one of "masternode start-<mode>", if not - wait 10-15 minutes to see if it fixes itself or not. If that doesn't help - close wallet, remove mncache.dat and peers.dat and try again.