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[Samba] samba-tool domain backup online errors


Attempting to run

samba-tool domain backup online --server=pfdc1.domain.local --targetdir=/backups/ -U administrator

gives the following errors.

Pre-loading the Samba 4 and AD schema
Unable to determine the DomainSID, can not enforce uniqueness constraint on local domainSIDs

Partition[DC=domain,DC=local] objects[1716/1738] linked_values[0/839]
../lib/ldb/ldb_tdb/ldb_index.c:2352: duplicate attribute value in CN=MRLENOVO-1,OU=Computers,OU=Records,OU=SITEA,DC=domain,DC=local for index on servicePrincipalName, duplicate of objectGUID 6f7a7d42-5a8e-4329-a6ff-083ff10a9d2b in @INDEX:SERVICEPRINCIPALNAME:TERMSRV/MRLENOVO-1.domain.LOCAL

Cloned domain DOMAIN (SID S-1-5-21-940051827-2291820289-3341758437)
ERROR(runtime): uncaught exception - (3221225506, '{Access Denied} A process has requested access to an object but has not been granted those access rights.')   File "/usr/local/samba/lib/python2.7/site-packages/samba/netcmd/__init__.py", line 177, in _run
    return self.run(*args, **kwargs)
  File "/usr/local/samba/lib/python2.7/site-packages/samba/netcmd/domain_backup.py", line 242, in run
    backup_online(smb_conn, sysvol_tar, remote_sam.get_domain_sid())
  File "/usr/local/samba/lib/python2.7/site-packages/samba/ntacls.py", line 499, in backup_online
    ntacl_sddl_str = smb_helper.get_acl(r_name, as_sddl=True)
  File "/usr/local/samba/lib/python2.7/site-packages/samba/ntacls.py", line 322, in get_acl

I am running this command from the DC I wish to make the backup of. Should I be running this from a remote DC? Thanks.

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