Fails installation on openerp 6.0

[Mr. Tezozomoc]

Traceback (most recent call last):
  File "/opt/openerp/server/bin/netsvc.py", line 489, in dispatch
    result = ExportService.getService(service_name).dispatch(method, auth, params)
  File "/opt/openerp/server/bin/service/web_services.py", line 599, in dispatch
    res = fn(db, uid, *params)
  File "/opt/openerp/server/bin/osv/osv.py", line 122, in wrapper
    return f(self, dbname, *args, **kwargs)
  File "/opt/openerp/server/bin/osv/osv.py", line 176, in execute
    res = self.execute_cr(cr, uid, obj, method, *args, **kw)
  File "/opt/openerp/server/bin/osv/osv.py", line 167, in execute_cr
    return getattr(object, method)(cr, uid, *args, **kw)
  File "/opt/openerp/server/bin/addons/base/module/wizard/base_module_upgrade.py", line 98, in upgrade_module
    _db, pool = pooler.restart_pool(cr.dbname, update_module=True)
  File "/opt/openerp/server/bin/pooler.py", line 60, in restart_pool
    return get_db_and_pool(db_name, force_demo, status, update_module=update_module)
  File "/opt/openerp/server/bin/pooler.py", line 39, in get_db_and_pool
    addons.load_modules(db, force_demo, status, update_module)
  File "/opt/openerp/server/bin/addons/__init__.py", line 883, in load_modules
    processed_modules.extend(load_module_graph(cr, graph, status, report=report, skip_modules=processed_modules))
  File "/opt/openerp/server/bin/addons/__init__.py", line 719, in load_module_graph
    init_module_objects(cr, package.name, modules)
  File "/opt/openerp/server/bin/addons/__init__.py", line 414, in init_module_objects
    result = obj._auto_init(cr, {'module': module_name})
  File "/opt/openerp/server/bin/addons/magentoerpconnect_generic/sale.py", line 226, in _auto_init
    cr.execute("ALTER TABLE account_invoice_line ALTER COLUMN discount TYPE numeric(16,6);")
  File "/opt/openerp/server/bin/sql_db.py", line 78, in wrapper
    return f(self, *args, **kwargs)
  File "/opt/openerp/server/bin/sql_db.py", line 131, in execute
    res = self._obj.execute(query, params)
NotSupportedError: cannot alter type of a column used by a view or rule
DETAIL: rule _RETURN on view report_account_invoice_product depends on column "discount"

[Sébastien BEAU - http://www.akretion.com (sebastien.beau)]

This bug is fixed in rev 472 on trunk version.
It was a incompatibility between sale_margin and magentoerpconnect