I haven't looked into why this only happens the second time I run the update, but right now I'm running into the following backtrace the second time I run update.php except that without my fix, the following line does not appear after "...flow_revision table does not contain rev_user_text field."
The backtrace is
```
Adding index PRIMARY to table flow_wiki_ref ...A database query error has occurred.
Query: ALTER TABLE `wiki1flow_wiki_ref` ADD PRIMARY KEY (ref_id)
Function: DatabaseBase::sourceFile( /var/www/html/w/extensions/Flow/db_patches/patch-ref_id-phase2.sql )
Error: 1062 Duplicate entry '\x00' for key 'PRIMARY' (cihcisddb352v.corporate.ge.com:7780)
Backtrace:
#0 /var/www/html/w/includes/db/Database.php(901): DatabaseBase->reportQueryError('Duplicate entry...', 1062, 'ALTER TABLE `wi...', 'DatabaseBase::s...', false)
#1 /var/www/html/w/includes/db/Database.php(3057): DatabaseBase->query('ALTER TABLE `wi...', 'DatabaseBase::s...')
#2 /var/www/html/w/includes/db/Database.php(2978): DatabaseBase->sourceStream(Resource id #582, false, false, 'DatabaseBase::s...', false)
#3 /var/www/html/w/includes/installer/DatabaseUpdater.php(669): DatabaseBase->sourceFile('/var/www/html/w...')
#4 /var/www/html/w/includes/installer/DatabaseUpdater.php(742): DatabaseUpdater->applyPatch('/var/www/html/w...', true, 'Adding index PR...')
#5 [internal function]: DatabaseUpdater->addIndex('flow_wiki_ref', 'PRIMARY', '/var/www/html/w...', true)
#6 /var/www/html/w/includes/installer/DatabaseUpdater.php(455): call_user_func_array(Array, Array)
#7 /var/www/html/w/includes/installer/DatabaseUpdater.php(420): DatabaseUpdater->runUpdates(Array, true)
#8 /var/www/html/w/maintenance/update.php(179): DatabaseUpdater->doUpdates(Array)
#9 /var/www/html/w/maintenance/doMaintenance.php(103): UpdateMediaWiki->execute()
#10 /var/www/html/w/maintenance/update.php(224): require_once('/var/www/html/w...')
#11 {main}
```
Patch incoming.