In graphql / lighthouse I got "input." in sql-statement. How to fix it?

Using input in laravel 9 / lighthouse 6 app:

input VoteCategoryInput {
    name: String! @rules(apply: ["string", "min:2", "max:255", "unique:vote_categories"]),
    active: Boolean!,
    in_subscriptions: Boolean!,
    meta_description: String,
    meta_keywords: [String],
}


extend type Mutation {
   createVoteCategory(
       input: VoteCategoryInput! @spread
   ): VoteCategory! @create

and running mutation :

  mutation {
    createVoteCategory (
      input: {
        name: "Vote Category name"
        active: true
        in_subscriptions: true
        meta_keywords: ["meta_keywords 1", "meta_keywords 2"]
      }
    ) {
        id
        name
        slug
        in_subscriptions
        meta_description
        meta_keywords
        created_at
    }
  }

I got error :

"SQLSTATE[42S22]: Column not found: 1054 Unknown column 'input.name' in 'where clause'
 (SQL: select count(*) as aggregate from `vote_categories` where `input`.`name` = Vote Category name)",

Which syntax have I to use to exclude “input.” in sql-statement ?

The Lighthouse docs describe a caveat with the unique rule here: https://lighthouse-php.com/master/security/validation.html#validating-input-objects

Using the unique validation rule can be a bit tricky.

If the argument is nested within an input object, the argument path will not match the column name, so you have to specify the column name explicitly.

input CreateUserInput {
  email: String @rules(apply: ["unique:users,email_address"])
}