I got the following error message while trying to upgrade PhpBB 2 to PhpBB 3
Colliding usernames were found on your old board. In order to complete the conversion please delete or rename these users so that there is only one user on your old board for each clean username.
See the screenshot below
We have fixed the error by run the below SQL Query to PhpBB 2 Database
update phpbb_users set username='553' where user_id=553; update phpbb_users set username='554' where user_id=554; update phpbb_users set username='555' where user_id=555; update phpbb_users set username='575' where user_id=575; update phpbb_users set username='563' where user_id=563; update phpbb_users set username='574' where user_id=574;
Are you using older version of phpBB ? Then, we will help you to upgrade your forum.
Through the Forum Upgrade service From HostOnNet guarantees you a smooth application upgrade with absolutely no risk on your side.
We take all the necessary security measure to make sure your data is kept safe and your forum application won’t break for any predictable or unpredictable reasons.
Avoid potential upgrade failure frustrations/headaches – let us keep your data safe!
We offer the following phpBB services
Upgrades from phpBB 3.0.x or 2.x
phpBB MOD installation
phpBB Template design
If you have any requirement in phpBB, please email your requirement to firstname.lastname@example.org