Sometimes the distribution block switch sticks and a good hard stomp on the brake pedal can recenter it.
They can also do this when one side of the master gets low on fluid, and then not recenter after filling.
Otherwise if your brakes seem fine you can disconnect the wire to the distribution block or E brake switch and make the light go off.
It could also just need the Ebrake switch adjusted if disconnecting that wire makes the light go off.