diff --git a/jtserv/adduser.sh b/jtserv/adduser.sh
index e895938..f0908da 100755
--- a/jtserv/adduser.sh
+++ b/jtserv/adduser.sh
@@ -1,14 +1,20 @@
 #!/bin/sh
 
+## Feeding CSV as follows:
+##	user,gecos,email,team
+#	j2100,"HIROSE Yuuji",yuuji@es.gentei.org,Teacher
+
+## This script can be run repeatedly in order to change team allocation.
+
 DB=${1:-users.sq3}
-CSV=${2:-users.csv}
+CSV=${2:-trrusers.csv}
 sqlite3 ${DB} <<-EOF
 	.mode csv
-	PRAGMA foreign_keys=on;
 	CREATE TEMPORARY TABLE newuser(user, gecos, email, team);
 	.import $CSV newuser
+	DELETE FROM newuser WHERE user LIKE 'user';
 	INSERT INTO teams SELECT distinct team FROM newuser
 			  WHERE team NOT IN (SELECT team FROM teams);
-	INSERT INTO users SELECT user, gecos, email, team
-		FROM newuser WHERE user NOT IN (SELECT user FROM users);
+	PRAGMA foreign_keys=off;		-- To avoid score deletion
+	REPLACE INTO users SELECT user, gecos, email, team FROM newuser;
 EOF