Were you expecting them? Do you hatch in the trays?
I see you have duck eggs in there too, are the trays turned off? If not you could get a chick stuck between the turning racks.
No I was not expecting them so early as I had only placed them in the Incubator on the 5th of March so they were a bit early
And yes These did hatch out in the trays as I have never experienced any problems before when doing so .