I was trying to login on this website that had used mysqli for the database and it spit out this error:
SQL ERROR [ mysqli ]
Out of range value adjusted for column 'user_login_attempts' at row 1 
An SQL error occurred while fetching this page. Please contact the Board Administrator if this problem persists.
Could it be, because the failed login attempts we're higher then the actual login attempts and there wasn't a check correctly making sure if that value was to big?
Just like to help out as I don't know what version of this board it, but I still would like to report it.
It was for a wysiwyg mod on phpbb. (I'm almost not sure what version of phpBB this is, but I know its 3.x.x