$result = [
   0 => [
       category   => 'Solution',
       name       => 'Name1',
       value1     => 20
       value2     => 21
   ],
   1 => [
       category   => 'Solution',
       name       => 'Name2',
       value1     => 30,
       value2     => 31
   ],
   2 => [
       category   => 'Solution1',
       name       => 'Name3',
       value1     => 40,
       value2     => 41
   ]
]

$new_array = [
    0 => [
        name    => 'Solution',
        value1  => 50   // sum of array with key = 0 and key = 1
        value2  => 52
    ],
    1 => [
        name    => 'Name1'
        value1  => 20,
        value2  => 21
    ],
    2 => [
        name    => 'Name2',
        value1  => 30,
        value2  => 31
    ],
    3 => [
        name    => 'Solution1',
        value1  => 40,
        value2  => 41
    ],
    4 => [
        name    => 'Name3',
        value1  => 40,
        value2  => 41
    ]
]

private function groupByProductSuperCategory($datas)
{
    $return = [];
    foreach ($datas as $data) {
        $return[$data['PRODUCT_FAMILY']][$data['PRODUCT_SUPER_CATEGORY']] = array_sum(array_column('category', $data);
    }
    return $return;
}