Update 6001 fails with table prefixes - missing brackets

Update 6001 failed on an upgrade from Drupal 5 with the following error...

Table 'natparks_drupal6.send_contact' doesn't exist query: INSERT INTO npt_send_contact_mail (scid, name, mail) SELECT scid, name, mail FROM send_contact WHERE mode = 'mail' in E:\clients\nationalparkstraveler\website6\sites\all\modules\send\send.install on line 489.

Site is using a table prefix of "npt_". Query does not include {} around send_contact.

Patch appears to have worked, but 6001 had already been run, so re-running it caused a lot of duplicate field errors, etc...