Gives an error when trying to run the playbook (pb_f5_onboard.yml) a second time.

[alic-antunez]

Trying to add a user to an F5 bigip with Ansible:
This is my config:

---

ubuntu1@alicantunez:~/f5_ansible$ cat hosts
[ltm]
ltm01 Ansible_host=10.10.10.136

ubuntu1@alicantunez:~/f5_ansible$ cat group_vars/all.yml
conn_parameters:
user: admin
password: alic2121.
server: "{{ Ansible_host }}"
server_port: 443
validate_certs: no

admin_passwd: NewP@sswd
users:
- name: Ansible
passwd: Ansible123
role: all:admin
state: present

ubuntu1@alicantunez:~/f5_ansible$ cat ansible.cfg
[defaults]
inventory=hosts
retry_files_enabled=False
gathering=explicit
host_key_checking=False

ubuntu1@alicantunez:~/f5_ansible$ cat pb_f5_onboard.yml

• name: Onboarding a New LTM
  hosts: ltm01
  connection: local
  tasks:

  • name: "P1T1: Create new Users"
    bigip_user:
    username_credential: "{{ item.name }}"
    password_credential: "{{ item.passwd }}"
    partition_access: "{{ item.role }}"
    state: "{{ item.state | default('present')}}"
    provider: "{{ conn_parameters }}"
    loop: "{{ users }}"

  • name: "P1T1: Update admin Password"
    bigip_user:
    username_credential: admin
    password_credential: "{{ admin_passwd }}"
    state: present
    provider: "{{ conn_parameters }}"

---

The first time I run the playbook the result is successful:

ubuntu1@alicantunez:~/f5_ansible$ ansible-playbook pb_f5_onboard.yml

PLAY [Onboarding a New LTM] **********************************************************************************************************************************

TASK [P1T1: Create new Users] ********************************************************************************************************************************
changed: [ltm01] => (item={'name': 'Ansible', 'passwd': 'Ansible123', 'role': 'all:admin', 'state': 'present'})
[WARNING]: Module did not set no_log for update_password

TASK [P1T1: Update admin Password] ***************************************************************************************************************************
changed: [ltm01]

PLAY RECAP ***************************************************************************************************************************************************
ltm01 : ok=2 changed=2 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0

But when I try to run it a second time (having deleted the user from the first run), I get the following error.

Why is this happening and how can I correct it?
Thanks in advance