[BUGS] failed to lookup type 0

When I try to delete data from one table, I get this error: ERROR: get_typdefault: failed to lookup type 0 I can't find any reasons other than a bug. The PG version is 7.3.4 Get advanced SPAM filtering on Webmail or POP Mail ... Get

Re: [BUGS] failed to lookup type 0

Thanks both for your response. Here is a screen shot with the table definition and reproducible example: mm=# \d signon Table "public.signon" Column | Type | Modifiers -+---+--- name| character varying(25) | not null user_id