I have created a new custom module for Odoo 8 and I have created a new group for secure this module. The security.xml is like this:
<record model="ir.module.category" id="testmodule_category_testmodule">
<field name="name">Test</field>
<field name="sequence">20</field>
</record>
<record id="testmodule_group_manager" model="res.groups">
<field name="name">Manager</field>
<field name="category_id" ref="testmodule_category_testmodule"/>
</record>
When I install this custom module for the first time it works everything ok but if I update this module, when I try to access to Configuration->Users->Users I get this error:
File "D:\work\odoo\odoo\openerp\addons\base\ir\ir_ui_view.py", line 369, in raise_view_error
raise AttributeError(message)
AttributeError: El campo `in_group_15` no existe
Error de contexto:
Vista `res.users.form`
[view_id: 153, xml_id: base.view_users_form, model: res.users, parent_id: n/a]
Also, I have created a new module from odoo.py scaffold and only added this security.xml for testing this error, but I get always this when update the module. If I remove and reinstall it works fine but not when update.
UPDATE
If I get a fresh install of Odoo it works fine, install, uninstall and upgrade module. Maybe there are a conflict with another module. In the fields list I don't see any module field named 'in_group_15'. How can I get what module is the conflict?