You have done something very very ODD.
Somehow you have added your phpbb database tables into the mysql database.
the database called mysql is supposed to be for MYSQL itself to use to store knowledge about databases/tables/columns/users/privileges etc and not for you to add other tables into.
You should create a new database for each of your projects, MYSQL is not Access. It can manage many seperate databases and multiple tables within many databases.
Not quite sure how to get you out of this mess.
If it looked like you were familiar with MYSQL I woudl suggest other options, but here I think the best solution woudl be to uninstall WAMPServer and start again with a fresh install. ( make sure you manually delete the \wamp folder after the uninstall is run).
Then reinstall wampserver, and phpbb, but this time spend a little longer reading the phpbb Install instructions. [
www.phpbb.com]
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(Windows 10 Pro 64bit) (Wampserver 3.3.4 64bit) Aestan Tray Menu 3.2.5.4
<Apache versions MULTIPE> <PHP versions MULTIPLE> <MySQL Versions MULTIPLE>
<MariaDB versions MULTIPLE> <phpMyAdmin versions MULTIPLE> <MySQL Workbench 8.0.23>Read The Manuals Apache --
MySQL --
PHP --
phpMyAdminGet your Apache/MySQL/mariaDB/PHP ADDONs here from the
WAMPServer alternate Repo-X-X-X-
Backup your databases regularly Here is How dont regret it later! Yes even when developing -X-X-X-