Existing Ansible BIG-IP modules

Hi I am trying to use above script in my test lab but I am getting errors. Can anybody help me please ?

[root@ansible playbooks]# ansible-playbook f5.yml

[DEPRECATION WARNING]: bigip_facts is kept for backwards compatibility but usage is discouraged. The module documentation details page may explain more about this rationale.. This feature

will be removed in a future release. Deprecation warnings can be disabled by setting deprecation_warnings=False in ansible.cfg.

PLAY [Test bigip_facts] *********************************************************************************************************************************************************************

TASK [Gathering Facts] **********************************************************************************************************************************************************************

ok: [f5ltest01a]

TASK [Get all of the facts from my BIG-IP] **************************************************************************************************************************************************

fatal: [f5ltest01a]: FAILED! => {"msg": "The task includes an option with an undefined variable. The error was: 'f5ltest01a' is undefined\n\nThe error appears to be in '/etc/ansible/playbooks/f5.yml': line 6, column 8, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n tasks:\n   - name: Get all of the facts from my BIG-IP\n    ^ here\n"}

PLAY RECAP **********************************************************************************************************************************************************************************

f5ltest01a         : ok=1  changed=0  unreachable=0  failed=1  skipped=0  rescued=0  ignored=0