Automation changes not saved upon update?

Hello, I am still getting notifications from trigger, despite the fact that I have removed the trigger from the automation. Trigger is:

    entity_id: sensor.zigbee_teplomer_linkquality
    for: '02:00:00'

The automation:

alias: Telegram if sensor update timeout
description: ''
trigger:
  - platform: state
    entity_id: sensor.lora_mqtt_gw_test_counter
    for: '01:10:00'
  - platform: state
    entity_id: sensor.flower2_distance
    for: '09:00:00'
  - platform: state
    entity_id: sensor.projektor_power
    for: '03:00:00'
  - platform: state
    entity_id: sensor.0x60a423fffe138d2b_linkquality
    for: '02:00:00'
action:
  - service: notify.jan_b
    data:
      message: '"{{ trigger.from_state.attributes.friendly_name }} update timeout!"'
mode: single

but new automation tracker still show original version of automation before I removed the trigger:

id: '1616699697070'
alias: Telegram if sensor update timeout
description: ''
trigger:
  - platform: state
    entity_id: sensor.lora_mqtt_gw_test_counter
    for: '01:10:00'
  - platform: state
    entity_id: sensor.flower2_distance
    for: '09:00:00'
  - platform: state
    entity_id: sensor.projektor_power
    for: '03:00:00'
  - platform: state
    entity_id: sensor.zigbee_teplomer_linkquality
    for: '02:00:00'
  - platform: state
    entity_id: sensor.0x60a423fffe138d2b_linkquality
    for: '02:00:00'
action:
  - service: notify.jan_b
    data:
      message: '"{{ trigger.from_state.attributes.friendly_name }} update timeout!"'
mode: single

What could be wrong?

You can’t use for: without to:

If you do a configuration check after saving your automation it will tell you your configuration is invalid.

You should always do a configuration check before reloading or restarting.

Actually that works. I found it elsewhere here on community that this kind of trigger can be used to check how long the state has not been updated. Can you advise how to design trigger that fires off when state has not been updated for 2 hours?