title: MySQL: All tables OK but still ERROR 1577 (system tables used by Event Scheduler were found damaged)
body: <p>From my syslog:</p>
  
  <pre><code>mysql[1663]: ERROR 1577 (HY000) at line 1: Cannot proceed because system tables used by Event Scheduler were found damaged at server start
  </code></pre>
  
  <p>I tried this command to find damaged tables:</p>
  
  <pre><code>mysqlcheck -A --auto-repair --password
  </code></pre>
  
  <p>but all tables are OK. What's to do now?</p>
  
  <p><strong>EDIT</strong></p>
  
  <p>I also tried</p>
  
  <pre><code>sudo mysql_upgrade -u root -h localhost -p --verbose --force
  </code></pre>
  
  <p>but everything is OK. Still get the error.</p>