How to Remove Guest posts topics that will not delete from PHPBB forums

1. Open you Cpanel

2. Find Databases and select phpMyAdmin

3. Then you need to find your phpbb database

4. Then on left hand list select phpbb_topics

5. Click on Search

6. Find topic_last_poster_id and place a 0 (number zero) in value box and press Enter key

You will now see a list of all the guest topics found with search

7. Click on the X to delete each of them.