Error with command module while using Ansible 2.9

[pothedarsuhas]

• name: Generate updated grub2.cfg
  command: grub2-mkconfig -o /etc/grub2.cfg
  when: result|changed ####### this line seems to be the error

fatal: [xx.xx.xxx.x]: FAILED! => {"msg": "The conditional check 'result|changed' failed. The error was: template error while templating string: no filter named 'changed'. String: {% if result|changed %} True {% else %} False {% endif %}\n\nThe error appears to be in '/root/potheba/provisioning-onprem/kubernetes/cluster-build/ansible/roles/disable-swap/tasks/main.yml': line 29, column 3, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n- name: Generate updated grub2.cfg\n ^ here\n"}

when using result|changed filter