title: Mysql replication error Last_IO_Error
body: <p>We have existing server master to master replication on two server, and we not mentioned 11.12.13.18 ip in any where, but we are getting error like below.</p>
  
  <pre><code>Last_IO_Error: Master command COM_REGISTER_SLAVE failed: Access denied for user 'user'@'11.12.13.18' (using password: YES) (Errno: 1045)
  </code></pre>
  
  <p>Any suggestions?</p>