isotope filter again

Hi,

I have a problem with changing the isotope filter on my site. I wanted to add another date (2017), but it failed. I tried this in the function.php of the parent theme:

function wpupg_change_terms_order( $filter_terms_order, $grid ) { 
if( $grid->slug() == 'grid_01' ) { 
$filter_terms_order = array( 'Alles', '2017', '2016', '2015', '2014', '2013', '2012', '2011' ); 
} 
return $filter_terms_order; 
} 
add_filter( 'wpupg_grid_cache_filter_isotope_term_order', 'wpupg_change_terms_order', 10, 2 );

But 2017 is not shown.
My website is here: https://www.doerthe-baeumer.de/arbeiten/

Can you please help?
mic