1- Rename the folder mysql/data to mysql/data_old (you can use any name)
Rename the folder data to old_data in mysql folder, You can use Any name.
Path: xammp/mysqli/data
2- Create a new folder mysql/data
Path: xammp/mysqli/data
3- Copy the content that resides in mysql/backup to the new mysql/data folder
4- Copy all your database folders that are in mysql/data_old to mysql/ data (skipping the mysql, performance_schema, and phpmyadmin folders from data_old)
5- Finally copy the ibdatal file from mysql/data_old and replace it inside mysql/data folder
6- Reastart your system.
