Index: branches/dev/html/install/sql/add/dtb_trackback_mysql.sql
===================================================================
--- branches/dev/html/install/sql/add/dtb_trackback_mysql.sql	(revision 11971)
+++ branches/dev/html/install/sql/add/dtb_trackback_mysql.sql	(revision 14733)
@@ -4,6 +4,6 @@
 	blog_name varchar(255) NOT NULL DEFAULT '',
 	title varchar(255) NOT NULL DEFAULT '',
-	excerpt text NOT NULL DEFAULT '',
-	url text NOT NULL DEFAULT '',
+	excerpt text NOT NULL ,
+	url text NOT NULL ,
 	status int NOT NULL DEFAULT 2,
 	del_flg int NOT NULL DEFAULT 0,