XAMPP

Roll back to the old version of MySQL at XAMPP

Modify the configuration of MySQL

modify the path of basedir, datadir, Server

[mysqld]
basedir=C:/mysql_old
datadir=C:/mysql_old/data

[WinMySQLadmin]
Server=C:/mysql_old/bin/mysqld-nt.exe

Modify the path of MySQL service

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\mysql\ImagePath

• original: "C:\Program Files\xampp\mysql\bin\mysqld-nt.exe" "--defaults-file=C:\Program Files\xampp\mysql\bin\my.cnf" mysql
• old version: "C:\mysql_old\bin\mysqld-nt.exe" "--defaults-file=C:\mysql_old\bin\my.cnf" mysql

restart the MySQL service