diff --git a/db/db.update.198.sql b/db/db.update.198.sql
index b746a0c..07e491f 100644
--- a/db/db.update.198.sql
+++ b/db/db.update.198.sql
@@ -34,3 +34,13 @@ DROP TABLE `users_conferences_link`;
 
 -- Add conferences ID to users
 ALTER TABLE `users` ADD `conferences_id` INT NOT NULL AFTER `accounts_id`;
+
+-- Change the (unique) index in the users table from (username,year) 
+-- to (accounts_id,conferences_id)
+ALTER TABLE `users` DROP INDEX `username`;
+ALTER TABLE `users` ADD UNIQUE (`accounts_id` , `conferences_id`);
+
+-- Add deleted/deleted_datetime data to the accounts table
+ALTER TABLE `accounts` ADD `deleted` ENUM( 'no', 'yes' ) NOT NULL DEFAULT 'no' AFTER `superuser`;
+ALTER TABLE `accounts` ADD `deleted_datetime` DATETIME NOT NULL AFTER `deleted`;
+UPDATE `accounts` SET `deleted`='no';