i have touched up the shape of the head and the throat according to this picture :
i also of course did a new skin for the head
but now, i want to add spikes on the helmet like you can see on the picture above.
i therefore created polygons in the shape of it but i was wondering if you could attach them because once i wanted to remove a f*cked one, a message popped saying "are you sure you want to remove all selected polygons" (or smthg like this, not sure) so i cliked yes

and then, all my newly created polygons were removed (hopefully, ctrl+z saved the day

anyone knows what i am missing here ?