Error 500 - duplicate entry in MySQL

[static1635]

Hi all
I am trying to work out an issue with my forum.
When one clicks Submit on a new post it goes to Error 500 - the error flags up duplicate entry.
What would be the best way to take out the MySQL error?

[Wed Apr 03 13:28:56.770687 2024] [fcgid:warn] [pid 128720:tid
139807916865280] [client 85.255.232.200:1936] mod_fcgid: stderr: PHP
Fatal error: Uncaught mysqli_sql_exception: Duplicate entry '338-2155'
for key 'phpbb_topics_posted.PRIMARY' in
/home/bigglesforum/bigglesforum.net/forum/phpbb/db/driver/mysqli.php:193,
referer:
posting.php?f=14&mode=reply&t=2155&sid= ... 7b16e79788

The post shows up after submit though even though it throws that error.

Thanks for any ideas.
The forum is https://bigglesforum.net

[coeyjollier]

This is exactly my issue and I've had 0 luck fixing it. Did you by chance resolve it or get any closer?

[static1635]

I updated to the latest version and the error went away