Try to add the following PHP code snippet to the child theme functions.php file to fix this. Clear your plugin’s cache and resave these pages.

add_action( 'init', function(){
    add_filter( 'pll_copy_post_metas', function($metas){
        foreach ($metas as $key => $value) {
      if ( 'woodmart_shortcodes_custom_css' === $value ) {
        unset( $metas[$key] );
      }
    }

    
        return $metas;
    }, 1 );
} );