Z2M fails to start with "device...must be string" when playing with "Settings/Home Assistent Name"

[sbolten]

What happened?

Added a "Home Assistent Name" through "Device --> Settings --> Home Assistent Name"
Removed the name through "Device --> Settings --> Home Assistent Name" (emptied the field)
Restart of Z2M fails with an error

[09:57:48] INFO: Starting Zigbee2MQTT...
Starting Zigbee2MQTT without watchdog.
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
READ THIS CAREFULLY
Refusing to start because configuration is not valid, found the following errors:

• devices/0x3410f4fffee1354c/homeassistant/name must be string
  If you don't know how to solve this, read https://www.zigbee2mqtt.io/guide/configuration
  !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Looking at the configuration.yaml I found the following for this device:

'0x3410f4fffee1354c':
friendly_name: switch_3
description: Studio Bad
optimistic: true
retain: true
homeassistant:
name: null

The crucial part is obviously the "name:null"

Replacing this with "homeassistant: {}" or some valid string (not null) solves the problem

What did you expect to happen?

Z2M restarting without errors even though I fiddled around with the Home Assistant Name

How to reproduce it (minimal and precise)

See "What happened"

Field I changed:

Config before change:

Changed the value of the field:

Config after change:

Removed string from field again:

Config after removing the string:

Restarting and error log of Z2M:

Editing the config back to its original situation (removing "name: null") solved the issue:

Zigbee2MQTT version

2.1.1-1

Adapter firmware version

20230507

Adapter

Sonoff_Zigbee_3.0_USB_Dongle_Plus

Setup

Add-on HAOS

Debug log

No response