Error running sp_helpdb

When I run sp_helpdb against the master (or any other DB for that matter) I get the following error:

Server: Msg 515, Level 16, State 2, Procedure sp_helpdb, Line 53
Cannot insert the value NULL into column 'owner', table 'tempdb.dbo.#spdbdesc_ 0010001A6EF'; column does not allow nulls. INSERT fails. The statement has been terminated.

I have about 20 DBs on a SQL Server 2000 Standard Edition Instance with sp3a .

There have been no changes made to the Server or the SQL Server Instance in quite some time. Can anyone tell me how I should proceed??I think spid is null in master.dbo.sysdatabases,
check that first.

select spid from master.dbo.sysdatabases
u can use sp, sp_changedbowner 'ownername' if it is null .

And check that link,it may help u.
http://dbforums.com/t554105.html|||I did check select * from master.dbo.sysdatabases and I don't see anything unusual. and thanks.. but that other post wasn't very helpful... : (

I did some poking around and noticed that when I look at the properties of my Model and msdb databases in Enterprise Manager, they BOTH have {unknown} for Owner !!?? that CAN'T be a good thing !!
I checked BOL for sp_changedbowner and it says that you can't change the owner on master, msdb and ,model - so I'm a little leary to try it... Anyone have an suggestions? ... please..

Can I use sp_changdbowner on model and msdb if they are already Null or as Enterprise Manager puts it... UNKNOWN ? ?|||Yes u cannot chage owner of master,msdb and model db,Onlyway is,


eg:this will will change model db owner to 'sa'
exec sp_configure 'allow updates', 1
RECONFIGURE WITH OVERRIDE
go
update sysdatabases
set sid = 0x01
where name = 'model'
go
sp_configure 'allow updates', 0
RECONFIGURE WITH OVERRIDE|||Can I ask a dumb question??

How does that code change the owner? I see where it sets the SID. and, should the SID be set the same for model and msdb?|||0x01 is the sid of sa user,msdb,model db's owner should be under sa.

u can see that in,

select name, suser_sname(sid),sid
from master.dbo.sysdatabases|||Told you it was a dumb question. Thanks much!