diff --git a/pandora_console/ChangeLog b/pandora_console/ChangeLog
index 4959b78c03..bcb5cc8d07 100644
--- a/pandora_console/ChangeLog
+++ b/pandora_console/ChangeLog
@@ -1,3 +1,9 @@
+2012-04-28  Junichi Satoh  <junichi@rworks.jp>
+
+	* pandoradb.postgreSQL.sql,
+	extras/pandoradb_migrate_4.0.x_to_4.1.postgreSQL.sql: Fixed database
+	creation failure with before 9.1 version of PostgreSQL.
+
 2012-04-27 Juan Manuel Ramon <juanmanuel.ramon@artica.es>
 
 	* images/enterprise_version.png
diff --git a/pandora_console/extras/pandoradb_migrate_4.0.x_to_4.1.postgreSQL.sql b/pandora_console/extras/pandoradb_migrate_4.0.x_to_4.1.postgreSQL.sql
index 245e7ddd08..8bbed6237c 100644
--- a/pandora_console/extras/pandoradb_migrate_4.0.x_to_4.1.postgreSQL.sql
+++ b/pandora_console/extras/pandoradb_migrate_4.0.x_to_4.1.postgreSQL.sql
@@ -196,7 +196,7 @@ ALTER TABLE "talert_compound" ADD COLUMN "special_day" SMALLINT default 0;
 -- Table `ttimezone`
 -- -----------------------------------------------------
 
-CREATE TABLE IF NOT EXISTS "ttimezone" (
+CREATE TABLE "ttimezone" (
   "id_tz" INTEGER NOT NULL PRIMARY KEY,
   "zone" varchar(60) NOT NULL,
   "timezone" varchar(60) NOT NULL
diff --git a/pandora_console/pandoradb.postgreSQL.sql b/pandora_console/pandoradb.postgreSQL.sql
index c9db234b65..dd4b6383ad 100644
--- a/pandora_console/pandoradb.postgreSQL.sql
+++ b/pandora_console/pandoradb.postgreSQL.sql
@@ -1286,7 +1286,7 @@ CREATE TABLE "tevent_filter" (
 -- Table `ttimezone`
 -- -----------------------------------------------------
 
-CREATE TABLE IF NOT EXISTS "ttimezone" (
+CREATE TABLE "ttimezone" (
   "id_tz" INTEGER NOT NULL PRIMARY KEY,
   "zone" varchar(60) NOT NULL,
   "timezone" varchar(60) NOT NULL