title: Not unique table/alias
body: <p>I get the error <code>ERROR 1066 (42000): Not unique table/alias:</code> </p>
  
  <p>I cant figure out whats wrong with it.</p>
  
  <pre><code>SELECT Project_Assigned.ProjectID, Project_Title, Account.Account_ID, Username, Access_Type
  FROM Project_Assigned 
  JOIN Account 
    ON Project_Assigned.AccountID = Account.Account_ID
  JOIN Project
    ON Project_Assigned.ProjectID = Project.Project_ID
  where Access_Type = 'Client';
  </code></pre>