.Htaccess file edit

i edit .htaccess file for
===========================================
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ – [L]

# uploaded files
RewriteRule ^files/(.+) wp-includes/ms-files.php?file=$1 [L]

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ – [L]
RewriteRule . index.php [L]
==================================================================
multisite purpose suddenly i got following error

wp_1_posts: Table ‘wordpress1.wp_1_posts’ doesn’t exist
wp_1_comments: Table ‘wordpress1.wp_1_comments’ doesn’t exist
wp_1_links: Table ‘wordpress1.wp_1_links’ doesn’t exist
wp_1_options: Table ‘wordpress1.wp_1_options’ doesn’t exist
wp_1_postmeta: Table ‘wordpress1.wp_1_postmeta’ doesn’t exist
wp_1_terms: Table ‘wordpress1.wp_1_terms’ doesn’t exist
wp_1_term_taxonomy: Table ‘wordpress1.wp_1_term_taxonomy’ doesn’t exist
wp_1_term_relationships: Table ‘wordpress1.wp_1_term_relationships’ doesn’t exist
wp_1_commentmeta: Table ‘wordpress1.wp_1_commentmeta’ doesn’t exist