- Login to phpMyAdmin
- Choose the affected database. If you only have one database, it should choose it by default so you don't need to do anything.
- In the main panel, you should see a list of your database tables. Check the boxes by the tables that need repair.
- At the bottom of the window just below the list of tables, there is a drop down menu. Choose "Repair Table"
This should fix your table, and let you access it again. Now that it is fixed... it's a good idea to make that database backup!