Cannot add property heading_name, object is not extensible

[iptvcld]

I have the below
entities:
- sensor.canadian_imperial_bank_of_commerce
- type: custom:entity-attributes-card
entity: sensor.canadian_imperial_bank_of_commerce
#heading_name: Test
filter:
include:
- sensor.canadian_imperial_bank_of_commerce.lastPriceUpdated
- sensor.canadian_imperial_bank_of_commerce.change
- sensor.canadian_imperial_bank_of_commerce.changePercent
- sensor.canadian_imperial_bank_of_commerce.highestPrice
- sensor.canadian_imperial_bank_of_commerce.lowestPrice

ERROR:
Cannot add property heading_name, object is not extensible
type: 'custom:entity-attributes-card'
entity: sensor.canadian_imperial_bank_of_commerce
filter:
include:
- sensor.canadian_imperial_bank_of_commerce.lastPriceUpdated
- sensor.canadian_imperial_bank_of_commerce.change
- sensor.canadian_imperial_bank_of_commerce.changePercent
- sensor.canadian_imperial_bank_of_commerce.highestPrice
- sensor.canadian_imperial_bank_of_commerce.lowestPrice

[Dunkelschunkel-zz]

This one is bothering my as well. I can see, the moment I but something under the include part this message appears.

Have been tinkering with it a bit and did not find any solution.

[limes007]

A simple workaround: Define 'heading_name' and 'heading_state' in your card definition. E.g.

entity: sun.sun
filter:
  include:
    - sun.sun.next_rising
    - sun.sun.next_setting
    - sun.sun.next_dawn
    - sun.sun.next_dusk
type: 'custom:entity-attributes-card'
heading_name: Name
heading_state: State

[TRusselo]

heading_name: ' '
heading_state: ' '
works a bit better..