Not a bug Mysqli prepare error: Table 'shadowsp_forum.xf_thread_prefix' doesn't exist - library/Zend/Db/Statem


Well-known member
Since my upgrade I have an error log over 25 pages long with the same error

Mysqli prepare error: Table 'shadowsp_forum.xf_thread_prefix' doesn't exist - library/Zend/Db/Statement/Mysqli.php:77


XenForo developer
Staff member
This happens if you don't close your forum before you do the upgrade (ie, new files, old database).

Expected right now and it's not really possible to prevent every possible error (especially fatal ones). For big upgrades, I would recommend that you close off access to the forum while upgrading (or accept errors may occur).