Problem with certificate, can't create new database !

I am using the lastest trunk of OpenErp.

When I try to create a new database I get this error (server sided):
[Wed Jan 07 2009 09:00:43] ERROR:web-services:[01]: CREATE DATABASE
[Wed Jan 07 2009 09:00:43] ERROR:web-services:[02]: Traceback (most recent call last):
[Wed Jan 07 2009 09:00:43] ERROR:web-services:[03]: File "/usr/local/lib/openerp/server/bin/service/web_services.py", line 88, in __call__
[Wed Jan 07 2009 09:00:43] ERROR:web-services:[04]: update_module=True)[1]
[Wed Jan 07 2009 09:00:43] ERROR:web-services:[05]: File "/usr/local/lib/openerp/server/bin/pooler.py", line 55, in restart_pool
[Wed Jan 07 2009 09:00:43] ERROR:web-services:[06]: return get_db_and_pool(db_name, force_demo, status, update_module=update_module)
[Wed Jan 07 2009 09:00:43] ERROR:web-services:[07]: File "/usr/local/lib/openerp/server/bin/pooler.py", line 38, in get_db_and_pool
[Wed Jan 07 2009 09:00:43] ERROR:web-services:[08]: addons.load_modules(db, force_demo, status, update_module)
[Wed Jan 07 2009 09:00:43] ERROR:web-services:[09]: File "/usr/local/lib/openerp/server/bin/addons/__init__.py", line 610, in load_modules
[Wed Jan 07 2009 09:00:43] ERROR:web-services:[10]: modobj.update_list(cr, 1)
[Wed Jan 07 2009 09:00:43] ERROR:web-services:[11]: File "/usr/local/lib/openerp/server/bin/addons/base/module/module.py", line 335, in update_list
[Wed Jan 07 2009 09:00:43] ERROR:web-services:[12]: 'certificate': terp.get('certificate', ''),
[Wed Jan 07 2009 09:00:43] ERROR:web-services:[13]: File "/usr/local/lib/openerp/server/bin/addons/base/module/module.py", line 502, in write
[Wed Jan 07 2009 09:00:43] ERROR:web-services:[14]: return super(module, self).write(cr, uid, ids, vals, context=context)
[Wed Jan 07 2009 09:00:43] ERROR:web-services:[15]: File "/usr/local/lib/openerp/server/bin/osv/orm.py", line 2201, in write
[Wed Jan 07 2009 09:00:43] ERROR:web-services:[16]: 'where id in ('+ids_str+')', upd1)
[Wed Jan 07 2009 09:00:43] ERROR:web-services:[17]: File "/usr/local/lib/openerp/server/bin/sql_db.py", line 76, in wrapper
[Wed Jan 07 2009 09:00:43] ERROR:web-services:[18]: return f(self, *args, **kwargs)
[Wed Jan 07 2009 09:00:43] ERROR:web-services:[19]: File "/usr/local/lib/openerp/server/bin/sql_db.py", line 114, in execute
[Wed Jan 07 2009 09:00:43] ERROR:web-services:[20]: res = self._obj.execute(query, params)
[Wed Jan 07 2009 09:00:43] ERROR:web-services:[21]: IntegrityError: la valeur d'une clé dupliquée rompt la contrainte unique « ir_module_module_certificate_uniq »