Current selection does not contain a unique column. Grid edit, checkbox, Edit, Copy and Delete features are not available.
This WordPress database error may be the result of database upgrade. When it occurs, you are unable to carry out any actions on your database tables. Webhosts often upgrade their databases without informing their clients beforehand.
In order to fix this problem you have to assign a primary key to each table.
Steps to add primary key:
- Log into phpMyAdmin and select your database
- Select a column in your table
- Create a unique index
If the above does not work, try to run one of the following queries:
ALTER TABLE `wp_comments` MODIFY COLUMN `comment_ID` INT AUTO_INCREMENT PRIMARY KEY
ALTER TABLE `wp_options` ADD PRIMARY KEY (`option_id`), ADD UNIQUE KEY `option_name` (`option_name`);