On my search head UI I'm seeing the version number as 6.1.9 as shown in the screenshot.
But on my search head CLI I'm seeing as follows :-
Which among these two is my splunk search head version and the other version number indicates what?
Can you try in another browser to see the behavior? Did you performed upgrade recently? Check you $SPLUNK_HOME path variable and make sure it is pointing to correct location.
Do you have single installation of Splunk on the server? If yes, then make sure you running cmd against correct running version.