Hello,

I am using odoov10. I have one application created from studio.
It has a menu with External Identifier: studio_customization.findata_findata_83bfd12d-ca55-4715-a827-f15c594acd16

I want to make a new module (in Python) that extends this application. I want to add a submenu to that menu:

I am making the following view:

<?xml version="1.0"?>
<odoo>
    <menuitem id="studio_customization.findata_b69e1b31-3783-40e3-a65a-a408b3af640e" name="FinData" />
    <menuitem id="menu_findata_reports"
              name="Reports"
              parent="studio_customization.findata_b69e1b31-3783-40e3-a65a-a408b3af640e"
    />
</odoo>

But I receive this error:

File "/home/odoo/odoo-10.0/odoo/tools/convert.py", line 251, in _test_xml_id
    assert modcnt == 1, """The ID "%s" refers to an uninstalled module""" % (xml_id,)
ParseError: "The ID "studio_customization.findata_b69e1b31-3783-40e3-a65a-a408b3af640e" refers to an uninstalled module" while parsing /home/odoo/odoo-10.0/custom-addons/findata_pnl_inapp/view/findata_menu.xml:3, near
<menuitem id="studio_customization.findata_b69e1b31-3783-40e3-a65a-a408b3af640e" name="FinData"/>