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    'RXX-1' => {
        'RCA 1' => '',
...
        'key' => 'HKKJ',
        'ID' => '232',
    }

    for my $row(1 ..$row_max){
        my $count = 1;
...
                if defined $worksheet->get_cell($row, 1)->value(); 
        }
    }

    '1' => {
        'code'  => 'RXX-1'
...
        'code'  => '',
        .....
    }