Hello community!

While im working in openERP i get this Error:

>     Client Traceback (most recent call last):
>       File "/usr/lib/pymodules/python2.7/openerp/addons/web/http.py",
> line 204, in dispatch
>         response["result"] = method(self, **self.params)
>       File "/usr/lib/pymodules/python2.7/openerp/addons/web/controllers/main.py",
> line 1037, in load_needaction
>         return req.session.model('ir.ui.menu').get_needaction_data(menu_ids,
> req.context)
>       File "/usr/lib/pymodules/python2.7/openerp/addons/web/session.py",
> line 42, in proxy
>         result = self.proxy.execute_kw(self.session._db,
> self.session._uid,
> self.session._password, self.model,
> method, args, kw)
>       File "/usr/lib/pymodules/python2.7/openerp/addons/web/session.py",
> line 30, in proxy_method
>         result = self.session.send(self.service_name,
> method, *args)
>       File "/usr/lib/pymodules/python2.7/openerp/addons/web/session.py",
> line 103, in send
>         raise xmlrpclib.Fault(openerp.tools.ustr(e),
> formatted_info)
>     
>     
>     Server Traceback (most recent call last):
>       File "/usr/lib/pymodules/python2.7/openerp/addons/web/session.py",
> line 89, in send
>         return openerp.netsvc.dispatch_rpc(service_name,
> method, args)
>       File "/usr/lib/pymodules/python2.7/openerp/netsvc.py",
> line 292, in dispatch_rpc
>         result = ExportService.getService(service_name).dispatch(method,
> params)
>       File "/usr/lib/pymodules/python2.7/openerp/service/web_services.py",
> line 626, in dispatch
>         res = fn(db, uid, *params)
>       File "/usr/lib/pymodules/python2.7/openerp/osv/osv.py",
> line 190, in execute_kw
>         return self.execute(db, uid, obj, method, *args, **kw or {})
>       File "/usr/lib/pymodules/python2.7/openerp/osv/osv.py",
> line 132, in wrapper
>         return f(self, dbname, *args, **kwargs)
>       File "/usr/lib/pymodules/python2.7/openerp/osv/osv.py",
> line 199, in execute
>         res = self.execute_cr(cr, uid, obj, method, *args, **kw)
>       File "/usr/lib/pymodules/python2.7/openerp/osv/osv.py",
> line 187, in execute_cr
>         return getattr(object, method)(cr, uid, *args, **kw)
>       File "/usr/lib/pymodules/python2.7/openerp/addons/base/ir/ir_ui_menu.py",
> line 322, in get_needaction_data
>         model, id = model_data_obj.get_object_reference(cr,
> uid, menu_data.split('.')[0],
> menu_data.split('.')[1])
>       File "/usr/lib/pymodules/python2.7/openerp/tools/cache.py",
> line 18, in lookup
>         r = self.lookup(self2, cr, *args)
>       File "/usr/lib/pymodules/python2.7/openerp/tools/cache.py",
> line 46, in lookup
>         value = d[key] = self.method(self2, cr, *args)
>       File "/usr/lib/pymodules/python2.7/openerp/addons/base/ir/ir_model.py",
> line 872, in get_object_reference
>         data_id = self._get_id(cr, uid, module, xml_id)
>       File "/usr/lib/pymodules/python2.7/openerp/tools/cache.py",
> line 18, in lookup
>         r = self.lookup(self2, cr, *args)
>       File "/usr/lib/pymodules/python2.7/openerp/tools/cache.py",
> line 46, in lookup
>         value = d[key] = self.method(self2, cr, *args)
>       File "/usr/lib/pymodules/python2.7/openerp/addons/base/ir/ir_model.py",
> line 865, in _get_id
>         raise ValueError('No such external ID currently defined in the
> system: %s.%s' % (module, xml_id))
>     ValueError: No such external ID currently defined in the system:
> sale.menu_sale_quotations

I cant fix that and need your Help, what can i do?

EDIT: The error appears when im clicking on the menu Sales.