"LaTeX Warning: Label `1' multiply defined." with twoside document and option `margin`

Using option margin with two different values in a twoside document results in:

LaTeX Warning: Label `1' multiply defined.

Here a minimal working example:

\documentclass[twoside]{article}% option twoside needed
\usepackage[margin={0cm,1cm}]{caption}% option margin with two different values needd
\usepackage{mwe}
\begin{document}
\begin{figure}
\includegraphics{example-image}
\caption{Test}% also happens with \caption* instead of \caption
\end{figure}
\end{document}

and the message after two LaTeX runs:

(./captionissue.aux

LaTeX Warning: Label `1' multiply defined.

)