Pic is not very clear, I am guessing that is a symbol representing 'Home with cross sign', ? most likely the LIF is not on the Home-port (might have moved due to network/port/cable issue)
Anyway, first identify if there are any lifs not-at-home.
In the GUI, where you saw that thing, is there a column that says "Is-Home" ? Most likely it will be 'No' next to that port.
From cmd line, you can identify non-home lifs:
::> network interface show -is-home false
If home-port is healthy, simply revert the lif.