BuddyPress.org

Thank you r-a-y for the illustration but I found another answer by Andrew the greatest

You need to do the following:

1) deactivate buddypress on the sub-blog

2) remove all buddypress tables

3) go into wp_sitemeta and remove all buddypress rows

4) remove any of the lines you’ve added to wp-config.php for buddypress

5) activate buddypress sitewide.

Thanks,

Andrew