Have you seeked support there already? Doesn't sound related to phpBB at all.
Sounds like the cleaned username is wrong for all. Consider using the STK which has the option "clean usernames".
I would make a guess that it has something to do with the "CMS2CMS Migration Demo" and that your question should be asked at the place where you acquired this.
In 3.2 there is the CLI though, which in this case comes in handy with the command... Consider using the STK which has the option "clean usernames".
Code: Select all
/** * Executes the command user:reclean * * Cleans user names that are unclean. * * @param InputInterface $input The input stream used to get the options * @param OutputInterface $output The output stream, used to print messages * * @return int 0 if all is well, 1 if any errors occurred */