XF 2.1 Upgraded, and no one including myself can post

[Xyphien]

XF\Db\Exception: MySQL query error [1364]: Field 'alternative_best_answers' doesn't have a default value in src/XF/Db/AbstractStatement.php at line 217
[LIST=1]
[*]XF\Db\AbstractStatement->getException() in src/XF/Db/Mysqli/Statement.php at line 196
[*]XF\Db\Mysqli\Statement->getException() in src/XF/Db/Mysqli/Statement.php at line 77
[*]XF\Db\Mysqli\Statement->execute() in src/XF/Db/AbstractAdapter.php at line 89
[*]XF\Db\AbstractAdapter->query() in src/XF/Db/AbstractAdapter.php at line 172
[*]XF\Db\AbstractAdapter->insert() in src/XF/Mvc/Entity/Entity.php at line 1452
[*]XF\Mvc\Entity\Entity->_saveToSource() in src/XF/Mvc/Entity/Entity.php at line 1184
[*]XF\Mvc\Entity\Entity->save() in src/XF/Service/Thread/Creator.php at line 285
[*]XF\Service\Thread\Creator->_save() in src/XF/Service/ValidateAndSavableTrait.php at line 40
[*]XF\Service\Thread\Creator->save() in src/XF/Pub/Controller/Forum.php at line 750
[*]XF\Pub\Controller\Forum->actionPostThread() in src/XF/Mvc/Dispatcher.php at line 321
[*]XF\Mvc\Dispatcher->dispatchClass() in src/XF/Mvc/Dispatcher.php at line 248
[*]XF\Mvc\Dispatcher->dispatchFromMatch() in src/XF/Mvc/Dispatcher.php at line 100
[*]XF\Mvc\Dispatcher->dispatchLoop() in src/XF/Mvc/Dispatcher.php at line 50
[*]XF\Mvc\Dispatcher->run() in src/XF/App.php at line 2177
[*]XF\App->run() in src/XF.php at line 390
[*]XF::runApp() in index.php at line 20
[/LIST]

I've updated xenforo from 1.x to 2.1 and now no one can post or do anything due to that error.
Am I going to have to manually delete the alternative_best_answers in the mysql? I've uninstalled it, so idk why it's still giving me the error. It was a legacy addon anyway and I made sure to turn them all off prior to upgrading the website.

 

[Ozzy47]

Apparently this is an ongoing issue, https://xenforo.com/community/threads/mark-posts-as-best-answer-deleted.55423/page-33#post-1006532

 

[Xyphien]

Alrighty, this has been solved.