models many2many field error

Hi all,

I've tested the OpenERP7.0 for several latest versions.

Every time when I modify a model and create a field type many2many, then I save model, it occur an error. The messages it show:
==============================================

OpenERP Server Error

Client Traceback (most recent call last):
  File "/opt/openerp/server/openerp/addons/web/http.py", line 203, in dispatch
    response["result"] = method(self, **self.params)
  File "/opt/openerp/server/openerp/addons/web/controllers/main.py", line 1129, in call_kw
    return self._call_kw(req, model, method, args, kwargs)
  File "/opt/openerp/server/openerp/addons/web/controllers/main.py", line 1121, in _call_kw
    return getattr(req.session.model(model), method)(*args, **kwargs)
  File "/opt/openerp/server/openerp/addons/web/session.py", line 43, in proxy
    result = self.proxy.execute_kw(self.session._db, self.session._uid, self.session._password, self.model, method, args, kw)
  File "/opt/openerp/server/openerp/addons/web/session.py", line 31, in proxy_method
    result = self.session.send(self.service_name, method, *args)
  File "/opt/openerp/server/openerp/addons/web/session.py", line 104, in send
    raise xmlrpclib.Fault(openerp.tools.ustr(e), formatted_info)

Server Traceback (most recent call last):
  File "/opt/openerp/server/openerp/addons/web/session.py", line 90, in send
    return openerp.netsvc.dispatch_rpc(service_name, method, args)
  File "/opt/openerp/server/openerp/netsvc.py", line 293, in dispatch_rpc
    result = ExportService.getService(service_name).dispatch(method, params)
  File "/opt/openerp/server/openerp/service/web_services.py", line 626, in dispatch
    res = fn(db, uid, *params)
  File "/opt/openerp/server/openerp/osv/osv.py", line 188, in execute_kw
    return self.execute(db, uid, obj, method, *args, **kw or {})
  File "/opt/openerp/server/openerp/osv/osv.py", line 131, in wrapper
    return f(self, dbname, *args, **kwargs)
  File "/opt/openerp/server/openerp/osv/osv.py", line 197, in execute
    res = self.execute_cr(cr, uid, obj, method, *args, **kw)
  File "/opt/openerp/server/openerp/osv/osv.py", line 185, in execute_cr
    return getattr(object, method)(cr, uid, *args, **kw)
  File "/opt/openerp/server/openerp/addons/base/ir/ir_model.py", line 185, in write
    return super(ir_model,self).write(cr, user, ids, vals, context)
  File "/opt/openerp/server/openerp/osv/orm.py", line 4178, in write
    result += self._columns[field].set(cr, self, id, field, vals[field], user, context=rel_context) or []
  File "/opt/openerp/server/openerp/osv/fields.py", line 557, in set
    id_new = obj.create(cr, user, act[2], context=context)
  File "/opt/openerp/server/openerp/addons/base/ir/ir_model.py", line 357, in create
    self.pool.get(vals['model'])._auto_init(cr, ctx)
  File "/opt/openerp/server/openerp/osv/orm.py", line 3007, in _auto_init
    self._m2m_raise_or_create_relation(cr, f)
  File "/opt/openerp/server/openerp/osv/orm.py", line 3313, in _m2m_raise_or_create_relation
    self._save_relation_table(cr, m2m_tbl)
  File "/opt/openerp/server/openerp/osv/orm.py", line 2874, in _save_relation_table
    """, (relation_table, self._module))
  File "/opt/openerp/server/openerp/sql_db.py", line 161, in wrapper
    return f(self, *args, **kwargs)
  File "/opt/openerp/server/openerp/sql_db.py", line 226, in execute
    res = self._obj.execute(query, params)
ProgrammingError: operator does not exist: character varying = boolean
LINE 5: AND ir_module_module.name=false
                                                 ^
HINT: No operator matches the given name and argument type(s). You might need to add explicit type casts.