In the __register__ of an module that add fields to party module, i have

        cursor.execute(*sql_table.select(
                sql_table.id, sql_table.vat_country, sql_table.country,
        where=(sql_table.type == 'ar_foreign')))

and in version 4.0 i get an error

ProgrammingError: column a.vat_country does not exist
LINE 1: SELECT "a"."id", "a"."vat_country", "a"."country" FROM "part...

if i remove the column a.vat_country it install without any problem, but dont know what i removed :D