Cannot override menus

I’m using Klipper with KlipperScreen (no display section in printer.cfg) and want to adjust the preheat options.
When I add this:

[menu __main __temp __preheat_pla]
type: list
name: Preheat PLA

[menu __main __temp __preheat_pla __all]
type: command
enable: {('extruder' in printer) and ('heater_bed' in printer)}
name: Preheat all
gcode:
    M140 S55
    M104 S205

to the printer.cfg, hit Save and Restart, then:

Section 'menu __main __temp __preheat_pla' is not a valid config section

appears.

How to achieve this?

KlipperScreen is not configured via Klipper’s printer.cfg. It has its own config file. Configuration - KlipperScreen

For future reference:

KlipperScreen.conf

[preheat PLA]
bed = 55
extruder = 205

[preheat PETG]
bed = 72
extruder = 235

[preheat PA12]
bed = 115
extruder = 275