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my %subs = ( path => [ @{$session{hierarchy_path}} ] );
$subs{bottom_path_term} = ${pop(@{$subs{path}})}{term};
if (@{$subs{path}}) { delete $subs{path}[$#{$subs{path}}]{id}; }
else { delete $subs{path}; }

Before:
 'hierarchy_path' => [
...
                                  'term' => 'Education'
                                }
                              ],