I have added a customized field to the res.partner model. I think I must have used an illegal character in the field name, as the browser now reports an error from all attempts to acces/view my databases. I am also unable to edit/fix anything via the browser. What can I do to fix this?

The server traceback:

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/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/res/res_users.py", line 363, in context_get res = getattr(user,k) or False File "/usr/lib/pymodules/python2.7/openerp/osv/orm.py", line 499, in __getattr__ raise AttributeError(e) AttributeError: u'x_bem\xe6rk'