Missing default helper log message - what a syntax!

I am using a component Dashboard where I declared the use of its helper

class Dashboard::BookingController < ApplicationController
uses_component_template_root
add_template_helper(BookingHelper)

the module BookingHelper is in: components/dashboard/booking folder
which is fine…

but in the log, I can see this message and it’s quite difficult to
understand the meaning :

“Dashboard::BookingController: missing default helper module
Dashboard::BookingHelper”

I believe it’s suggesting that the module ApplicationHelper is not
defined in my component ? or anything else … what should I do to
get rid of this message… ?

kad