Ticket #13859: 13859.diff

wp-admin/includes/schema.php

@@ -663 +663 @@
                 $wpdb->insert( $wpdb->site, array( 'domain' => $domain, 'path' => $path ) );
                 $network_id = $wpdb->insert_id;
         } else {
-                $wpdb->insert( $wpdb->site, array( 'domain' => $domain, 'path' => $path, 'network_id' => $network_id ) );
+                $wpdb->insert( $wpdb->site, array( 'domain' => $domain, 'path' => $path, 'id' => $network_id ) );
         }
 
         if ( !is_multisite() ) {