cannot import symbol EXPORT from add, because it already exists in this lexical scope

datas.pm6

#--datas.pm---

use YAML;

class datas {
  has Str $.filename is rw;
  has Array @.datas;
  has Str $.directory = %*ENV<HOME> ~ "/.vim/installer";
  has Str $.repo_dir = %*ENV<HOME> ~ "/.vim/bundle";
  has Str $.full_filename;
  method new (Str $filename) {
    self.bless( :$filename, :@datas, :$directory, :$repo_dir, :$full_filename );
    self.initialize_directory();
    self.initialize_filename_data();
    my $thing = slurp self.full_filename;
    self.datas = load($thing);
    return self;
  }

  method initialize_directory() {
    unless $!directory.IO.d  { mkdir $!directory or die "unable to create directory"; }
  }

  method initialize_filename_data() {
    $!full_filename = $!directory ~ $!filename;
    unless $!full_filename.IO.f  { 
      my @default = ( { group => "default", repos => [ { url => "", title => "" } ] } );
      spurt $!full_filename, dump( @default );
    } 
  }
  
  method save {
    spurt $!full_filename, dump(@!datas) or die "can not save datas.yml";
    say "Datas has been saved.";
  }

  method add_group( $group_name){
    @!datas.push: { group => "$group_name", repos => [] };
  }

  has method add_repo($group_name, $title, $url) {
    @!datas.map: {
      if ( $_<group> eq $group_name ) {
        $_<repos>.push: { title => "$title", url => "$url"}; }
    }
  }
}