I'm planning to do a force database upgrade to see if it will resolve my "missing categories after upgrade" issue. I will edit my db_version in options.php. Currently, WPMU 1.3.3 db_version is 6124 what is the db_version for WPMU 1.2.1 or will any lower number than 6124 will do?
I'm referencing the link below, but it only has db_version for WP single instance versus WPMU.
http://codex.wordpress.org/FAQ_Installation#How_do_you_force_a_database_upgrade.3F
Thank you.