title: How to solve mysql errno:-1?
body: <p>I used "alter table" command to add a foreign key in a table, after that I refresh my database then I saw there is not my table in my database,and I can not re-create this table at all,errorno is -1
  I do not have access to the files table On the server to delete them also I do not want to create other table with other storage engine or create another database,In fact my records in this table are very important.</p>