public static function validate(ZipValidationHelper $context, array $data): array
{
$rules = [
- 'id' => ['nullable', 'int'],
+ 'id' => ['nullable', 'int', $context->uniqueIdRule('chapter')],
'name' => ['required', 'string', 'min:1'],
'description_html' => ['nullable', 'string'],
'priority' => ['nullable', 'int'],