# Restart the numbering of the reference labels in the appendix body in overleaf

I have created a supplementary section in my journal manuscript using the following script:

\appendix
%%%
\renewcommand{\appendixname}{S}
\renewcommand{\thesection}{S}
\renewcommand\thefigure{\thesection.\arabic{figure}}
\setcounter{figure}{0}
\renewcommand*{\thepage}{S\arabic{page}}
\setcounter{page}{1}
%%%
\begin{center}
\section*{Supplementary Material}
\end{center}
%%%


A separate bibliography also has been generated for the appendix using the multibib package as follows:

\usepackage[resetlabels]{multibib}
\newcites{supp}{Supplementary References}


and declaring

%% Loading supplementary bibliography style file
\bibliographystylesupp{unsrt}
\bibliographysupp{cas-sc-template-refs.bib}

\end{document}


resulting in a reference section that looks like this: Supplmentary References

However, the reference labels in the body text does not change:

S.2. Discussion
I have tried the \DeclareOption{resetlabels}{\continuouslabelsfalse} option in the multibib package documentation given in http://tug.ctan.org/tex-archive/macros/latex/contrib/multibib/multibib.pdf but to no avail.