Error validating the fields parent_id

Hi
I have been using OpenERP V5 for about two years now for my very small company (one person so far
). I'd like to switch to V6.
There is not much data to migrate. Mainly my chart of accounts, invoices, a couple of partners and the bank statements.
I tried to install your server_migration modules on OpenERP V6, but get error messages:
Error occured while validating the field(s) parent_id: Error!
You cannot create recursive Menu.
Any idea what is wrong?
Thanks
Michael
I have been using OpenERP V5 for about two years now for my very small company (one person so far

There is not much data to migrate. Mainly my chart of accounts, invoices, a couple of partners and the bank statements.
I tried to install your server_migration modules on OpenERP V6, but get error messages:
Error occured while validating the field(s) parent_id: Error!
You cannot create recursive Menu.
Any idea what is wrong?
Thanks
Michael