Step 1:

First, log in to your database via phpMyAdmin.

This can be done directly in the KAS (Technical Administration) panel by clicking menu item Databases and the phpMyAdmin icon right next to the respective database.

You can also access the phpMyAdmin directly by calling up www.yourdomain.com/mysqladmin/ and entering the login credentials of the database. The login credentials can be found inside your KAS (Technical Administration) under the menu item Databases.

Once inside the phpMyAdmin, please click the database name on the left side unless it's already selected.

Step 2:

On the right side please scroll down and click Check all below the table list.

Step 3:

From the drop-down field, please select Repair table. Afterwards, phpMyAdmin tries to repair the affected tables. In case the repairing process will fail, the affected tables can only be repaired by restoring a database backup.