How to force EBS volume to detached from EC2? ec2_vol is not working.

[Bhavin Parmar]

I am trying to detach EBS volume:

--- # Ansible role to detach EBS Volume

  - name: Detach AWS EBS Volume

    ec2_vol:

      aws_access_key: '{{ AwsAccesskey }}'

      aws_secret_key: '{{ AwsSecretkey }}'

      region: '{{ region  }}'

      id: '{{ item }}'

      instance: None

    with_items: "{{ awsebsid }}"

...

It is not able to detach EBS volume if it is mounted. Please, can you suggest how to force or detach EBS volume? I understand it is best practice to unmount the volume from OS before detaching but is it compulsory?