Remove DocBlock @param and @return tags where the type is already defined by your PHP code.

Before

/**
 * This returns the sum of two integers.
 *
 * @param int $a
 * @param int $b
 * @return int
 */
public function add(int $a, int $b): int
{
    /** @var int */
    $sum = $a + $b;
 
    return $sum;
}

After

/**
 * This returns the sum of two integers.
 */
public function add(int $a, int $b): int
{
    $sum = $a + $b;
 
    return $sum;
}