Error: Existing command 'UNLOAD_FILAMENT' not found in gcode_macro rename

[fluxor99232]

I have the lines below in my printer.cfg. Am I doing something wrong or is that a bug?

[gcode_macro UNLOAD_FILAMENT]
rename_existing: KM_UNLOAD_FILAMENT
gcode:
  KM_UNLOAD_FILAMENT
  ; Home X, Y, and Z axes if not already home
  {% if "xyz" in printer.toolhead.homed_axes %}
    ; Move toolhead up 10mm from its current position
    G1 Z+10
    ; Move toolhead to X=200mm
    G1 X0
  {% else %}
    G28
  {% endif %}