The chemical equation you provided is inaccurate. Since both the left and right sides of the equation are exactly the same, this cannot happen in a chemical reaction.
A chemical reaction is the process of transforming one substance into another. During this process, atoms are rearranged to form new substances. Therefore, it is impossible for a chemical reaction to have both sides of the equation exactly the same.
You need to check your chemical equation so we can provide more detailed information.