Traceback (most recent call last):
  File "/usr/local/lib/python2.6/dist-packages/openerp-server/netsvc.py", line 245, in dispatch
    result = LocalService(service_name)(method, *params)
  File "/usr/local/lib/python2.6/dist-packages/openerp-server/netsvc.py", line 74, in __call__
    return getattr(self, method)(*params)
  File "/usr/local/lib/python2.6/dist-packages/openerp-server/service/web_services.py", line 632, in execute
    return self._execute(db, uid, wiz_id, datas, action, context)
  File "/usr/local/lib/python2.6/dist-packages/openerp-server/service/web_services.py", line 612, in _execute
    return wiz.execute(db, uid, self.wiz_datas[wiz_id], action, context)
  File "/usr/local/lib/python2.6/dist-packages/openerp-server/wizard/__init__.py", line 178, in execute
    res = self.execute_cr(cr, uid, data, state, context)
  File "/usr/local/lib/python2.6/dist-packages/openerp-server/wizard/__init__.py", line 73, in execute_cr
    action_res = action(self, cr, uid, data, context)
  File "/usr/local/lib/python2.6/dist-packages/openerp-server/addons/base/module/wizard/wizard_module_upgrade.py", line 92, in _upgrade_module
    db, pool = pooler.restart_pool(cr.dbname, update_module=True)
  File "/usr/local/lib/python2.6/dist-packages/openerp-server/pooler.py", line 62, in restart_pool
    return get_db_and_pool(db_name, force_demo, status, update_module=update_module)
  File "/usr/local/lib/python2.6/dist-packages/openerp-server/pooler.py", line 40, in get_db_and_pool
    addons.load_modules(db, force_demo, status, update_module)
  File "/usr/local/lib/python2.6/dist-packages/openerp-server/addons/__init__.py", line 740, in load_modules
    r = load_module_graph(cr, graph, status, report=report)
  File "/usr/local/lib/python2.6/dist-packages/openerp-server/addons/__init__.py", line 623, in load_module_graph
    tools.convert_csv_import(cr, m, os.path.basename(filename), fp.read(), idref, mode=mode)
  File "/usr/local/lib/python2.6/dist-packages/openerp-server/tools/convert.py", line 849, in convert_csv_import
    pool.get(model).import_data(cr, uid, fields, datas,mode, module,noupdate,filename=fname_partial)
  File "/usr/local/lib/python2.6/dist-packages/openerp-server/osv/orm.py", line 861, in import_data
    process_liness(self, datas, [], current_module, self._name, fields_def)
  File "/usr/local/lib/python2.6/dist-packages/openerp-server/osv/orm.py", line 690, in process_liness
    raise ValueError('No references to %s.%s' % (module, xml_id))
ValueError: No references to sale.group_sale_user