Extra Camera Actor in map

I was learning a tutorial on c++ cameras swapping and this caught my attention. An extra “camera actor” appeared in the map that causes swapping of the views from different camera actors almost impossible. Rummaging through my codes and nothing was found. In my desperation, i created a blank blueprint project and deleted everything. Clicking play, appeared to be fine with “nothing” existed. Added a box or something to the scene and the extra “camera actor” appeared.

Please advise on what causes the extra “camera actor” to appear and/or how to prevent it.