old lyx document in lyx 2.3.6 doesn't compile

[Csikos Bela]

Hello:I have an old document I made in lyx 2.0. Lyx 2.3.6.1 opens is but interprets the code incorrectly and gives compilation error:In lyx 2.0 the latex code is:\selectlanguage{magyar}%\begin{enumerate}[nosep]\inputencoding{latin2}%\item Első item.\inputencoding{latin9}\foreignlanguage{english}{}\\\foreignlanguage{english}{First item. }\selectlanguage{english}%\end{enumerate}Opening the file in lyx 2.3.6.1 latex code is:\selectlanguage{magyar}%\begin{enumerate}[\foreignlanguage{english}{nosep}]\inputencoding{latin2}%\item Első item.\inputencoding{latin9}\foreignlanguage{english}{}\\\foreignlanguage{english}{First item. }\selectlanguage{english}%\end{enumerate}How can I convert or open my lyx 2.0 document in lyx 2.3 so that it would work correctly?I attach the the lyx 2.0 file (MWE).Thanks,bcsikos
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