overleaf Extra alignment tab has been changed to cr

Could anyone please advise why I am getting the above error message. Apologies not able to figure out the issue. The & is correct. Many Thanks

begin{table}
begin{tabular}{|c|c|c|c|c|c|c|c|c|c|c|c|}
hline
multicolumn{12}{|c|}{Display Format} 
hline
multicolumn{2}{|c|}{Senescent}& multicolumn{2}{|c|}{Young}& multicolumn{2}{|c|}{Senescent}& multicolumn{2}{|c|}{Young}& multicolumn{2}{|c|}{Senescent}& multicolumn{2}{|c|}{Young}&
hline
0.6482 & 0.5074 & 
0.6482 & 0.5074 & 
0.6482 & 0.5074 & 
0.6482 & 0.5074 & 
0.6482 & 0.5074 & 
0.6482 & 0.5074 &
hline
end{tabular}
caption{Number of respondents for treatment}
end{table}