I have made this table but I have a warning:
"Overfull \hbox (5.0pt too wide) detected at line 336".
Can someone help me, please?
\documentclass[final,3p,times]{elsarticle}
\usepackage{amssymb}
\usepackage{amsmath}
\usepackage{graphicx}
\usepackage[export]{adjustbox}
\usepackage{tabularx}
\usepackage{multirow}
\usepackage{booktabs}
\usepackage{siunitx}
\usepackage{natbib}
\begin{document}
\begin{table}[!ht]
\caption{Numerical Analysis of the decrypted images}
\label{Metric}
\centering
\begin{tabular}{ll
S[table-format=1.4]
*{5}{S[table-format=-1.4]}
}
\toprule
\multirow{2}{*}[-1ex]{Images}
& \multirow{2}{*}[-1ex]{Metric}
& \multicolumn{4}{c}{Proposed Results} &{References} \\
\cmidrule{3-6}
& & {200} & {400} & {600} & {800} & \\
\midrule
\multirow{3}{*}{Goldhill}
& PSNR & 57.0074 & 59.2239 & 61.0477 & 63.3011 & \\
&SSIM & 0.9943 & 0.9976 & 0.9987 & 0.9993& \\
& ESR & 0.7470 & 0.5461& 0.3487 & 0.3487 & \\
\bottomrule
\end{tabular}
\end{table}
\end{document}