Beamer repeated citation new number

Question

I am discussing a topic on multiple frames, and I want to cite the original article on each slide using footfullcite. However beamer increases the citation number on each frame. Is there a way to tell beamer to increase it only if I refer to a new article?

Here is my approach:

\documentclass[mathserif]{beamer}
   \usepackage[style=verbose,backend=biber]{biblatex}

   \setbeamertemplate{footline}[frame number]
   \setbeamertemplate{caption}[numbered]

   \renewcommand{\footnotesize}{\tiny}

   \bibliography{refs}


   \begin{document}
       \frame{\frametitle{Title}
       \footfullcite{art}
   }   
   \frame{\frametitle{Title}
       \footfullcite{art}
   }   

\end{document}

Answer 1

[turning the previous comment into an answer]

Add

\addtocounter{footnote}{-1}

wherever you do not want the counter to be increased

Answer 2

I think you can also use

\footnotemark[\value{footnote}]

to show the current value of the counter without increasing it. And I guess you could use it to indicate a given value as well.

Taken from here