What does "Mmh ... It seems that you copied the code for the bite instead of moving it. You must remove the old code because you no longer need it"?

hello can you help me with something I understand, in interactive programs in the tasty tomato I do not understand this: Mmh ... It seems that you copied the code for the bite instead of moving it. You must remove the old code because you no longer need it. . is in the second step of putting ellipse.