I recently did two upgrades from phpBB 3.0.10 to phpBB 3.2.4 for two different clients. The same issues occurred.
- At the start of the migration, the upgrade program flagged an error. The phpbb_config_text table did not exist. I had to create it and its indexes in order to get it to start.
- During the 3.2 part of the migration, a similar error happened. The phpbb_oauth_states table did not exist. I had to create it and its indexes too.
I imagine these migration routines should test if the tables don't exist and if they don't create them rather than error out like this.