Can't Delete Boards Bug

[tetsujin]

This happens when I try to delete a board in my SMF with Tiny Portal Forum

Database Error: Lost connection to MySQL server during query
File: /var/www/html/smf/Sources/RemoveTopic.php
Line: 355

I have tried with many boards and it happens each time.

Cameron

[tetsujin]

Update: I looked through and now my topic, and total posts number on the board is  16777209 and  16777207 respectively.

Cameron