Notes for changing Wordpress Multisite Subdirectories:

Step 1

Update siteurl & home in wp_X_options Don’t forget the trailing slash

Step 2

Change corresponding paths in wp_blogs

Step 3 (Optional)

Clear Caches

Step 4

Check Image upload folders

Step 5

define( 'SITE_ID_CURRENT_SITE', 1 );
define( 'BLOG_ID_CURRENT_SITE', 1 );