Fastify calling controller method multiple times when multiple preHandler hook is called - node.js

Question

I have a fastify route method with the following schema.
fastify.post('/club', createClubSchema, createClub(fastify));
const createClubSchema = {
schema: {
tags: ['club'],
security: [
{
ApiKeyAuth: [],
},
],
body: {
type: 'object',
required: ['name', 'description'],
properties: {
name: { type: 'string', minLength: 3 },
description: { type: 'string', minLength: 3 },
logoUrl: { type: 'string', minLength: 3 },
},
},
response: {
200: {
type: 'object',
properties: {
status: { type: 'string' },
data: {
type: 'object',
properties: {
name: { type: 'string' },
description: { type: 'string' },
id: { type: 'number' },
color: { type: 'string' },
logoUrl: { type: 'string' },
createdAt: { type: 'string' },
updatedAt: { type: 'string' },
},
},
},
},
},
},
preHandler: [grantAccess('create', 'club')],
};
Now this route is in folder where there is autohooks.js is located that has a prehandler hook of it's own which checks whether the request has token in it for authentication purposes.
The problem is after the preHandler hook is called on both the area the createClub controller method is called, so a total of 2 times.
What is the issue? and how can i solve this?
EDIT
This is the autoHooks.js file
const authentication = require('../../middlewares/authentication');
module.exports = async function (fastify, opts, next) {
fastify.addHook('preHandler', authentication.authenticate(fastify));
};