asteriskMusic/create fails with objectExists exception

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4.0-3 errata360 (Walle)
Die Ausführung des Kommandos asteriskMusic/create ist fehlgeschlagen:

Traceback (most recent call last):
  File "%PY2.7%/univention/management/console/base.py", line 282, in execute
    function(self, request)
  File "%PY2.7%/univention/management/console/modules/asteriskMusic/__init__.py", line 103, in create
    "newDn": create(server, name),
  File "%PY2.7%/univention/management/console/modules/asteriskMusic/__init__.py", line 225, in create
    moh.create()
  File "%PY2.7%/univention/admin/handlers/__init__.py", line 352, in create
    return self._create()
  File "%PY2.7%/univention/admin/handlers/__init__.py", line 785, in _create
    self.lo.add(self.dn, al)
  File "%PY2.7%/univention/admin/uldap.py", line 396, in add
    raise univention.admin.uexceptions.objectExists, dn
objectExists: cn=default,cn=Telefonserver1,cn=asterisk,dc=*********,dc=**********