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Invalid Argumentyii\base\InvalidArgumentException

Operator 'IN' requires two operands.

$_GET = [
    'slug' => 'kid-step',
    'main_slug' => 'zhinochi',
    'sub_slug' => 'gamashi',
];

$_SESSION = [
    '__flash' => [],
    'brand_producer' => [
        [
            '' => '',
        ],
    ],
];