Replace Config

My customer is using Ansible, Python v2.7 and is trying to replace the config but he is unable to replace the Cisco IOS XR config, he can only merge it
Will adding the “replace: config” help? Is it supported?

Thanks

name: load a config from disk and replace the current config
  iosxr_config:
    src: config.cfg
    backup: yes
    **replace: config**