diff --git a/setup/db/create-schema.sql b/setup/db/create-schema.sql
index 65a8c463fc5..ddad7391e0b 100755
--- a/setup/db/create-schema.sql
+++ b/setup/db/create-schema.sql
@@ -870,7 +870,7 @@ CREATE TABLE `cloud`.`domain_router` (
   `public_netmask` varchar(15)  COMMENT 'netmask used for the domR',
   `guest_netmask` varchar(15) COMMENT 'netmask used for the guest network',
   `guest_ip_address` char(40) COMMENT ' ip address in the guest network',   
-  `network_id` bigint unsigned NOT NULL DEFAULT 0 COMMENT 'network configuration that this domain router belongs to',
+  `network_id` bigint unsigned NOT NULL COMMENT 'network configuration that this domain router belongs to',
   `role` varchar(64) NOT NULL COMMENT 'type of role played by this router',
   PRIMARY KEY (`id`),
   CONSTRAINT `fk_domain_router__id` FOREIGN KEY `fk_domain_router__id` (`id`) REFERENCES `vm_instance`(`id`) ON DELETE CASCADE
diff --git a/setup/db/db/schema-21to22.sql b/setup/db/db/schema-21to22.sql
index 26454f13f84..47c58eb714a 100755
--- a/setup/db/db/schema-21to22.sql
+++ b/setup/db/db/schema-21to22.sql
@@ -335,7 +335,7 @@ CREATE TABLE `cloud`.`user_vm_details` (
 
 ALTER TABLE `cloud`.`domain_router` MODIFY COLUMN `guest_netmask` varchar(15);
 ALTER TABLE `cloud`.`domain_router` MODIFY COLUMN `guest_ip_address` varchar(15);
-ALTER TABLE `cloud`.`domain_router` ADD COLUMN `network_id` bigint unsigned NOT NULL DEFAULT 0;
+ALTER TABLE `cloud`.`domain_router` ADD COLUMN `network_id` bigint unsigned NOT NULL;
 
 CREATE TABLE  `cloud`.`upload` (
   `id` bigint unsigned NOT NULL auto_increment,