The problem

related to #148683 as the MQTT device is from Zigbee2MQTT ;

I can't edit any Entity IDs of Z2M device entities in Home Assistant. If I change the Entity ID in Home Assistant settings and press "Update", the change does not stick. If I open the settings again for the entity, the old Entity ID is still there.

This worked fine up until May when I last added or changed any device/entity settings.

I rely on the entity name to have a certain pattern to sync state across zigbee switches:
e.g. switch.switch_name_1 switch.switch_name_2 etc...

Those aren't the name created by default. So I simply used to edit the entity ID manually to change it per my need. This option is no longer possible.

What version of Home Assistant Core has the issue?

core-2025.8.0

What was the last working version of Home Assistant Core?

No response

What type of installation are you running?

Home Assistant OS

Integration causing the issue

MQTT

Link to integration documentation on our website

No response

Diagnostics information

No response

Example YAML snippet

NA

Anything in the logs that might be useful for us?

NA

Additional information

No response