title: 1068 multiple primary key defined in mysql
body: <p>I export (with Update) my existing My SQL backup and import it to another PC via PHPAdmin but it gives below error message.  I need to just replace existing database on backup PC. Is it possible to do this?</p>
  
  <p>"#1068 - Multiple primary key defined"</p>
  
  <p>Thanks,
  Mohan K</p>