sorry for late reply i thought reply on the comment would do, anyway.
A die clash error happens when the coin dies come together in the coining press without a planchet between them. This causes an imprint of each die to be left on the opposing die face. For example, an impression of the obverse die is left on the reverse die, and vice versa. Although the Mint usually makes an effort to clean up these marks, they are sometimes visible on the coins themselves.
in this case the die clash is part of "0" appear in reverse side.
Definition: A die clash error happens when the coin dies come together in the coining press without a planchet between them. This causes an imprint of each die to be left on the opposing die face. For example, an impression of the obverse die is left on the reverse die, and vice versa. Although the Mint usually makes an effort to clean up these marks, they are sometimes visible on the coins themselves.
in this case obverse print of "0" part of it appear in the reverse.