Fatal Error in Gdn_Database.Query();

The MySQL server is running with the --read-only option so it cannot execute this statement

update GDN_UserDiscussion `UserDiscussion` set Notified = :Notified, LastNotified = :LastNotified where DiscussionID = :DiscussionID and UserID = :UserID

The error occurred on or near: /var/www/turpravda/turpravda-main/src/www/forums/library/database/class.database.php

290: 
291:          if (!is_object($PDOStatement)) {
292:             trigger_error(ErrorMessage('PDO Statement failed to prepare', $this->ClassName, 'Query', $this->GetPDOErrorMessage($this->Connection()->errorInfo())), E_USER_ERROR);
293:          } else if ($PDOStatement->execute($InputParameters) === FALSE) {
294:             trigger_error(ErrorMessage($this->GetPDOErrorMessage($PDOStatement->errorInfo()), $this->ClassName, 'Query', $Sql), E_USER_ERROR);
295:          }
296:       } else {
297:          $PDOStatement = $this->Connection()->query($Sql);
298:       }

Backtrace:

/var/www/turpravda/turpravda-main/src/www/forums/library/database/class.database.phpPHP::Gdn_ErrorHandler();
[/var/www/turpravda/turpravda-main/src/www/forums/library/database/class.database.php:294] PHP::trigger_error();
[/var/www/turpravda/turpravda-main/src/www/forums/library/database/class.sqldriver.php:1650] Gdn_Database->Query();
[/var/www/turpravda/turpravda-main/src/www/forums/library/database/class.sqldriver.php:1615] Gdn_SQLDriver->Query();
[/var/www/turpravda/turpravda-main/src/www/forums/plugins/BetterNotifications/class.betternotifications.plugin.php:126] Gdn_SQLDriver->Put();
[/var/www/turpravda/turpravda-main/src/www/forums/plugins/BetterNotifications/class.betternotifications.plugin.php:42] BetterNotifications->SetNotified();
[/var/www/turpravda/turpravda-main/src/www/forums/library/core/class.pluginmanager.php:705] BetterNotifications->DiscussionController_Render_Before();
[/var/www/turpravda/turpravda-main/src/www/forums/library/core/class.pluginmanager.php:638] Gdn_PluginManager->CallEventHandler();
[/var/www/turpravda/turpravda-main/src/www/forums/library/core/class.pluggable.php:256] Gdn_PluginManager->CallEventHandlers();
[/var/www/turpravda/turpravda-main/src/www/forums/applications/vanilla/controllers/class.discussioncontroller.php:244] Gdn_Pluggable->__call();
[/var/www/turpravda/turpravda-main/src/www/forums/applications/vanilla/controllers/class.discussioncontroller.php:244] DiscussionController->Render();
[/var/www/turpravda/turpravda-main/src/www/forums/applications/vanilla/controllers/class.discussioncontroller.php:244] DiscussionController->Index();
[/var/www/turpravda/turpravda-main/src/www/forums/library/core/class.dispatcher.php:350] PHP::call_user_func_array();
[/var/www/turpravda/turpravda-main/src/www/forums/index.php:67] Gdn_Dispatcher->Dispatch();

Variables in local scope:

[Sql] 'update GDN_UserDiscussion `UserDiscussion`
set Notified = :Notified,
 LastNotified = :LastNotified
where DiscussionID = :DiscussionID
  and UserID = :UserID'
[InputParameters] array (
  ':Notified' => '0',
  ':LastNotified' => NULL,
  ':DiscussionID' => '174792',
  ':UserID' => 0,
)
[Options] array (
  'ReturnType' => NULL,
)
[ReturnType] NULL
[PDOStatement] array (
  'queryString' => 'update GDN_UserDiscussion `UserDiscussion`
set Notified = :Notified,
 LastNotified = :LastNotified
where DiscussionID = :DiscussionID
  and UserID = :UserID',
)

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