Multiple SI units causes "Use of \@@array doesn't match its definition"

Question

When I include 2 \SI units in the right column, latex gives me the error Use of \@@array doesn't match its definition. Why is this and how can I fix it?

\documentclass{article}
\usepackage{siunitx}

\begin{document}

\begin{tabular}{|l|l|}
    \hline
    left & right \\ \hline
    left & 1, \SI{1e-1}, ..., \SI{1e-5} \\
    \hline
\end{tabular}

\end{document}

Answer 1

\SI takes two arguments, value and unit. If you just want to format a number, use \num{...}. \SI{A}{B} can (more or less) be seen as \num{A}\si{B}