Laravel Validation : how to set 'required_if' and 'integer'

I have two field qty, status I want to set a rule qty must 'integer' qty required when status is 0. qty can be empty when status is 1 I try to set rules as below

[
    'qty' => 'integer|required_if:status,0',
    'status' => 'required|integer|between:0,1'
]

But I don't know why when status is 1, do not show required error, but show integer error.

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