"enum $datatype expects $format with minimum of 2 comma separated values"; why?

[JayFoxRox]

I'm trying to use homie with valetudo, but it doesn't allow me to use the locate capability, which only allows PERFORM: https://valetudo.cloud/pages/integrations/mqtt.html#locatelocate

However, the current implementation prevents that:

node-red-contrib-homie-convention/nodes/homie-device-config/homie-device-config.js

Lines 454 to 458 in 5a4c468

	// check of enum $datatype has a comma separated list of minimum 2 items
	if (currentProperty.$datatype==='enum') {
	if (currentProperty.$format===undefined || currentProperty.$format.length==0) {currentProperty.validationError="enum $datatype need $format specified"; return false;}
	if (currentProperty.$format.indexOf(',')<0) {currentProperty.validationError="enum $datatype expects $format with minimum of 2 comma separated values"; return false;}
	}

I checked the homie convention and I can't see where it says that an enum must have at least 2 values.