diff --git a/agc_2-X/trunk/extras/MySQL_AST_CREATE_tables.sql b/agc_2-X/trunk/extras/MySQL_AST_CREATE_tables.sql
index 20f066f2..9fc2a2ca 100644
--- a/agc_2-X/trunk/extras/MySQL_AST_CREATE_tables.sql
+++ b/agc_2-X/trunk/extras/MySQL_AST_CREATE_tables.sql
@@ -196,7 +196,8 @@ parked_time DATETIME
 CREATE TABLE conferences (
 conf_exten INT(7) UNSIGNED NOT NULL,
 server_ip VARCHAR(15) NOT NULL,
-extension VARCHAR(100)
+extension VARCHAR(100),
+unique index extenserver (conf_exten, server_ip)
 ) ENGINE=MyISAM;
 
 CREATE TABLE recording_log (
@@ -249,7 +250,8 @@ department VARCHAR(30)
 CREATE TABLE server_updater (
 server_ip VARCHAR(15) NOT NULL,
 last_update DATETIME,
-db_time TIMESTAMP
+db_time TIMESTAMP,
+unique index serverip (server_ip)
 ) ENGINE=MyISAM;
 
 CREATE TABLE call_log (
@@ -1135,7 +1137,8 @@ conf_exten INT(7) UNSIGNED NOT NULL,
 server_ip VARCHAR(15) NOT NULL,
 extension VARCHAR(100),
 leave_3way ENUM('0','1') default '0',
-leave_3way_datetime DATETIME
+leave_3way_datetime DATETIME,
+unique index vextenserver (conf_exten, server_ip)
 ) ENGINE=MyISAM;
 
 CREATE UNIQUE INDEX serverconf on vicidial_conferences (server_ip, conf_exten);