Hello, Mohmmad
It is recommended to run import on a fresh WordPress installation. For this you can use the WordPress Database Reset plugin https://wordpress.org/plugins/wordpress-database-reset/ The plugin can be used to remove all the existing content and install a new version from scratch.
If you need any further assistance from our side, please submit a new topic – https://www.8theme.com/forums/xstore-wordpress-support-forum/
Kind Regards,
8theme team