Changing Your WordPress Multisite to Sub-directories or Sub-domains

I followed the following post to switch from subdirectories to subdomains: https://premium.wpmudev.org/blog/change-wordpress-multisite-to-sub-directories-sub-domains/

However, when I get to the step that says
"Save the file, and go back to your admin dashboard. Under Settings > Network Setup, follow the instructions that appear to replace your current code in your “.htaccess” file. You will need to update this file in order for the switch to work."

I cannot get to the admin dashboard. I get the following error:
"One or more database tables are unavailable. The database may need to be repaired."
I decided to go through those repair steps to see what was wrong:
It appears that I can't get into the site because I dropped the tables described earlier in the tutorial:

"If you would like to continue, then you will also need to remove these tables from your database:
wp_#_commentmeta
wp_#_comments
wp_#_links
wp_#_options
wp_#_postmeta
wp_#_posts
wp_#_terms
wp_#_term_relationships
wp_#_term_taxonomy"

Is there any way to fix this? It seems I have to restore my backup site and NOT remove those tables when I go through this process again, but I'm not sure.

Thanks!