Ansible - playbook error

roles_deployment_tasks_main.yml

---
- name: create group for deloyment and web
  group:
    state=present
    name=web
    system=yes

- name: create user for deployment and web
  user:
    state=present
    name=web
    group=www
    home=/home/web
    createhome=yes
    generate_ssh_key=yes
    ssh_key_bits=4096
    ssh_key_type=rsa
    ssh_key_comment="web user"

shell

➜  ansible  ansible-playbook -u root -i vagrant webserver.yml

PLAY [webservers] *************************************************************

GATHERING FACTS ***************************************************************
ok: [web.vagrant.box]

TASK: [deployment | create group for deloyment and web] ***********************
ok: [web.vagrant.box]

TASK: [deployment | create user for deployment and web] ***********************
failed: [web.vagrant.box] => {"failed": true, "item": ""}
msg: Group www does not exist

FATAL: all hosts have already failed -- aborting

PLAY RECAP ********************************************************************
           to retry, use: --limit @/Users/wopi/webserver.retry

web.vagrant.box            : ok=2    changed=0    unreachable=0    failed=1