Adding ldap group to access policy assert error

[Marel, J. van der (Jasper) via users]

Hi,

I modified my code for adding (LDAP) user groups to access policies. The code 
below worked for adding users to policies.
But when I try to run this snipplet I get the error :

security.py", line 559, in add_user_group_to_access_policy  assert 
user_group_id not in policy_user_group_ids

Can someone help me to understand what I am doing wrong here ?
Nipyapi version : 0.19.1


import nipyapi

class updatenifipolicy:
    def __init__(self,user):
        self.usergroup=user

    def devtest(self):
        test = "GSAPN1D_00000sm_IPA_GLO_OPS"
        nifi_reg_usergroup = 
nipyapi.security.get_service_user_group(test,identifier_type='identity', 
service='nifi')
        print("nifi usergroup : ", nifi_reg_usergroup.id)

        nifi_access_policies = [
            ("read", "/flow"),
            ]
        for action, resource in nifi_access_policies:
            pol = nipyapi.security.get_access_policy_for_resource(
                resource=resource,
                action=action,
                service='nifi',
                auto_create=False
            )
            try:
              nipyapi.security.add_user_group_to_access_policy(
                user_group=nifi_reg_usergroup,
                policy=pol,
                service='nifi',
                refresh=True,
              )
            except ValueError:
              print ("Nifi : Usergroup", self.usergroup, "Already added to 
policy")


Thanks in advance,

Jasper van der Marel

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