[6.1]Error on Employee unlink

With the last revision of OpenERP Server http://bazaar.launchpad.net/~openerp/openobject-server/6.1/revision/4268 I obtain an error if I unlink an employee.

Client Traceback (most recent call last):
  File "/home/hugo/openerp/sources/6.1/modules/web/common/http.py", line 180, in dispatch
    response["result"] = method(controller, self, **self.params)
  File "/home/hugo/openerp/sources/6.1/modules/web/controllers/main.py", line 1044, in call
    return self.call_common(req, model, method, args, domain_id, context_id)
  File "/home/hugo/openerp/sources/6.1/modules/web/controllers/main.py", line 996, in call_common
    return self._call_kw(req, model, method, args, {})
  File "/home/hugo/openerp/sources/6.1/modules/web/controllers/main.py", line 1010, in _call_kw
    return getattr(req.session.model(model), method)(*args, **kwargs)
  File "/home/hugo/openerp/sources/6.1/modules/web/common/openerplib/main.py", line 250, in proxy
    args, kw)
  File "/home/hugo/openerp/sources/6.1/modules/web/common/openerplib/main.py", line 117, in proxy
    result = self.connector.send(self.service_name, method, *args)
  File "/home/hugo/openerp/sources/6.1/modules/web/common/http.py", line 608, in send
    raise xmlrpclib.Fault(openerp.tools.exception_to_unicode(e), formatted_info)

Server Traceback (most recent call last):
  File "/home/hugo/openerp/sources/6.1/modules/web/common/http.py", line 593, in send
    return openerp.netsvc.dispatch_rpc(service_name, method, args)
  File "/home/hugo/openerp/sources/6.1/openobject-server/openerp/netsvc.py", line 360, in dispatch_rpc
    result = ExportService.getService(service_name).dispatch(method, params)
  File "/home/hugo/openerp/sources/6.1/openobject-server/openerp/service/web_services.py", line 586, in dispatch
    res = fn(db, uid, *params)
  File "/home/hugo/openerp/sources/6.1/openobject-server/openerp/osv/osv.py", line 167, in execute_kw
    return self.execute(db, uid, obj, method, *args, **kw or {})
  File "/home/hugo/openerp/sources/6.1/openobject-server/openerp/osv/osv.py", line 121, in wrapper
    return f(self, dbname, *args, **kwargs)
  File "/home/hugo/openerp/sources/6.1/openobject-server/openerp/osv/osv.py", line 176, in execute
    res = self.execute_cr(cr, uid, obj, method, *args, **kw)
  File "/home/hugo/openerp/sources/6.1/openobject-server/openerp/osv/osv.py", line 164, in execute_cr
    return getattr(object, method)(cr, uid, *args, **kw)
  File "/home/hugo/openerp/sources/6.1/modules/hr/hr.py", line 189, in unlink
    return super(hr_employee, self).unlink(cr, uid, ids, context=context)
  File "/home/hugo/openerp/sources/6.1/openobject-server/openerp/osv/orm.py", line 3726, in unlink
    result_store = self._store_get_values(cr, uid, ids, self._all_columns.keys(), context)
  File "/home/hugo/openerp/sources/6.1/openobject-server/openerp/osv/orm.py", line 4295, in _store_get_values
    target_ids = [id for id in function[id_mapping_fnct_](self, cr, SUPERUSER_ID, ids, context) if id]
  File "/home/hugo/openerp/sources/6.1/modules/hr/hr.py", line 85, in _get_job_position
    if employee.job_id:
  File "/home/hugo/openerp/sources/6.1/openobject-server/openerp/osv/orm.py", line 478, in __getattr__
    raise AttributeError(e)
AttributeError: 'Field job_id not found in browse_record(hr.employee, 13)'

I think that this error is related with this commit http://bazaar.launchpad.net/~openerp/openobject-server/6.1/revision/4262 because the field job_id is a field of hr.employee that is used to decide when to store a function in hr.job object and reverting changes to revision 4261 makes that it works as expected and there no are problems when trying to unlink an Employee.

Regards.