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If you just installed an upgrade, you might have skipped part of the installation instructions. Go back to the upgrade readme page reread the instructions. Pay special attention to the database structure step.
If you just installed TNG for the first time, you might still need to create the database tables. Return to the readme.html page to find that step.
If you are the site owner, you may contact TNG support for further assistance with this problem. Please copy the query below and paste it into your message.
Abt 1841 - Yes, date unknown
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