diff --git a/setup/db/db/schema-451to460.sql b/setup/db/db/schema-451to460.sql
index b618f7745e8..d41455376d0 100644
--- a/setup/db/db/schema-451to460.sql
+++ b/setup/db/db/schema-451to460.sql
@@ -399,6 +399,6 @@ CREATE TABLE `cloud`.`external_bigswitch_bcf_devices` (
   CONSTRAINT `fk_external_bigswitch_bcf_devices__physical_network_id` FOREIGN KEY (`physical_network_id`) REFERENCES `physical_network`(`id`) ON DELETE CASCADE
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
-ALTER TABLE `cloud`.`data_center` ADD COLUMN `ip6_super_network_cidr` varchar(255);
-ALTER TABLE `cloud`.`data_center` ADD COLUMN `as_number` varchar(255);
-ALTER TABLE `cloud`.`vpc` ADD COLUMN `ip6_cidr` varchar(255);
\ No newline at end of file
+ALTER TABLE `cloud`.`data_center` ADD COLUMN `ip6_super_network_cidr` varchar(50);
+ALTER TABLE `cloud`.`data_center` ADD COLUMN `as_number` varchar(15);
+ALTER TABLE `cloud`.`vpc` ADD COLUMN `ip6_cidr` varchar(50);
\ No newline at end of file