Database error

[RC Storick]

While trying to delete a board I get this message.  Can anyone help?

The SELECT would examine more than MAX_JOIN_SIZE rows; check your WHERE and use SET SQL_BIG_SELECTS=1 or SET MAX_JOIN_SIZE=# if the SELECT is okay
File: /home/stunthan/public_html/smf/Sources/ManageAttachments.php
Line: 571

Note: It appears that your database may require an upgrade. Your forum's files are currently at version SMF 1.1.21, while your database is at version 1.1.1. The above error might possibly go away if you execute the latest version of upgrade.php.

[Shambles]

I just tried using the search function (did you?) and found this in the first couple of hits

http://www.simplemachines.org/community/index.php?topic=515878

There may be others just as relevant.