To fix it, on file daos/mysql/Sources.php change:

• Line 203
  FROM '.\F3::get('db_prefix').'items,
  to
  FROM '.\F3::get('db_prefix').'items AS items,
  
  
• Line 205
  FROM '.\F3::get('db_prefix').'items
  to
  FROM '.\F3::get('db_prefix').'items AS items

I have submitted this fix to github, so I hope it will be fixed in future versions.