Forum OpenACS Q&A: acs_object_id_seq View

I was trying to add a new group type at admin/group-types/new, with a
supertype of the top level "Group". The insert failed at this sql in
/packages/acs-subsite/tcl/group-type-procs- postgresql.xql::new.copy_rel_types

  begin
    insert into group_type_rels 
      (group_rel_type_id, rel_type, group_type)
    select acs_object_id.nextval, r.rel_type, :group_type
    from group_type_rels r
    where r.group_type = :supertype;
    return null;
  end;

...which copies a composition and a membership relationship from the "Group" supertype to my new group type. The acs_object_id view is returning one id to be used for the insert, therein the failure.

I changed the sql to "nextval('t_acs_object_id_seq')", and all works fine; but I'm a Postgres newbie, and was wondering if there's a more appropriate fix, or something else that I should be doing instead.

Thanks, Randy