Ansible: add policy reference to object

I try adding a policy reference to an object via

    univention.ucs_modules.univention_directory_manager:
      module: "computers/domaincontroller_slave"
      dn: "<dn_of_replica>"
      policies:
        - "cn=<path_to_policy>"

which does add that reference, but deletes any existing references.
Is there a way to add a reference without deleting the existing references?

Tia,
Jens-Peter

The ‘policies’ parameter expects a list of all policies for an object. See comment on the parameter. https://github.com/univention/ansible-modules/blob/main/docs/univention_directory_manager.md#parameters

policies (list) “A list of policies to apply to the given object. You have to define all policies you expect at the users object.”