I found the solution. After some tries, with schema changed to

version: 1
schemas:
  # Daily is the top most schema since its parent is 'root' it must have an identifier
  # this identifier 'daily' will be used when using 'Lookup (schema)' command.
  - id: agenda
    parent: root
    # Children of the top most schema do not need to contain identifier and just
    # require a 'pattern' to be set to match the hierarchy of notes.
    children:
      - pattern: "[0-2][0-9][0-9][0-9]"
        children:
          - pattern: "[0-1][0-9]"
            children:
              - pattern: "[0-3][0-9]"
                # As with regular schema we can set the template to be used with
                # the match of our notes. Below is an example usage of shorthand templated
                # definition (which defaults to type: note).
                template:
                  id: templates.agenda
                  type: note