I need help quickly

[Quail eggs1653236]

Hi I have put my Chinese painted quail eggs in the incubator for one night my brother whanted to see what was in one on the second day so I candled one for him and it had an dark area witch isn’t the yolk it says there and it’s inside the shell it also feels heavy and it rattles
Here is a picture some one please help me

 

[nuthatched]

It shouldn't rattle, it's likely rotten.