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The results and calculations of the article \cite{SY} is found erroneous fora generic $r$ and it remains irremediable in general. However for $r=0$, $r=\pm1$, and $r >> 1$ it may be physically acceptable.

Comment on the paper Generalized version of chiral Schwinger model in terms of chiral bosonization, Eur.Phys.J.C 81 (2021) 3, 199