hr_holidays does not install

Traceback (most recent call last):
  File "/data/downloads/bzr/openobject-server/bin/netsvc.py", line 226, in dispatch
    result = LocalService(service_name)(method, *params)
  File "/data/downloads/bzr/openobject-server/bin/netsvc.py", line 74, in __call__
    return getattr(self, method)(*params)
  File "/data/downloads/bzr/openobject-server/bin/service/web_services.py", line 537, in execute
    return self._execute(db, uid, wiz_id, datas, action, context)
  File "/data/downloads/bzr/openobject-server/bin/service/web_services.py", line 517, in _execute
    return wiz.execute(db, uid, self.wiz_datas[wiz_id], action, context)
  File "/data/downloads/bzr/openobject-server/bin/wizard/__init__.py", line 178, in execute
    res = self.execute_cr(cr, uid, data, state, context)
  File "/data/downloads/bzr/openobject-server/bin/wizard/__init__.py", line 74, in execute_cr
    action_res = action(self, cr, uid, data, context)
  File "/data/downloads/bzr/openobject-server/bin/addons/base/module/wizard/wizard_module_upgrade.py", line 92, in _upgrade_module
    db, pool = pooler.restart_pool(cr.dbname, update_module=True)
  File "/data/downloads/bzr/openobject-server/bin/pooler.py", line 61, in restart_pool
    return get_db_and_pool(db_name, force_demo, status, update_module=update_module)
  File "/data/downloads/bzr/openobject-server/bin/pooler.py", line 40, in get_db_and_pool
    addons.load_modules(db, force_demo, status, update_module)
  File "/data/downloads/bzr/openobject-server/bin/addons/__init__.py", line 689, in load_modules
    load_module_graph(cr, graph, status, report=report)
  File "/data/downloads/bzr/openobject-server/bin/addons/__init__.py", line 593, in load_module_graph
    tools.convert_csv_import(cr, m, os.path.basename(filename), fp.read(), idref, mode=mode)
  File "/data/downloads/bzr/openobject-server/bin/tools/convert.py", line 848, in convert_csv_import
    pool.get(model).import_data(cr, uid, fields, datas,mode, module,noupdate,filename=fname_partial)
  File "/data/downloads/bzr/openobject-server/bin/osv/orm.py", line 632, in import_data
    process_liness(self, datas, [], fields_def)
  File "/data/downloads/bzr/openobject-server/bin/osv/orm.py", line 509, in process_liness
    id = ir_model_data_obj._get_id(cr, uid, module, xml_id)
  File "/data/downloads/bzr/openobject-server/bin/tools/misc.py", line 637, in cached_result
    result2 = fn(self2, cr, *args[2:self.skiparg], **kwargs2)
  File "/data/downloads/bzr/openobject-server/bin/addons/base/ir/ir_model.py", line 422, in _get_id
    assert len(ids)==1, '%d reference(s) to %s.%s. You should have one and only one !' % (len(ids), module, xml_id)
AssertionError: 0 reference(s) to hr_holidays.model_hr_holidays_log_access. You should have one and only one !