Hello Horst

Thank you for your purchase.

How is this table created? If it's not a manual table, check the Editing tab - ID column for editing. That has to be a unique, auto-increment integer column that will store the edited rows into the database. 

Please provide me a temporary WP-admin (administrator) user for your site where this happens, so we could log in and take a look ‘from the inside’ as that’s the most efficient way to see and resolve the issue. 

We do not interfere with any data or anything else except for the plugin (in case that’s a production version of the site), and of course, we do not provide login data to third parties. 

You can write credentials here just check PRIVATE Reply so nobody can see them except us.

Thanks, Horst

You actually don't have an ID column for editing. The column defined in the Editing tab above the table is "FeedbackToDo":

This is a string-type column:

That column has to be a unique, auto-increment integer column that will store the edited rows into the database.

So, in the database table, you need to add a row ID column (a unique auto-increment column). You can do it using this query:

ALTER TABLE `klangkulisse_podcasts`ADD COLUMN `wdt_id` INT AUTO_INCREMENT UNIQUE FIRST;

Then, in the Editing tab above the table, set this column to be the ID column for editing, and it should work fine after that.