diff --git a/OpenSim/Data/MySQL/Resources/RegionStore.migrations b/OpenSim/Data/MySQL/Resources/RegionStore.migrations
index 1e949c6a89..e6aa016b2b 100644
--- a/OpenSim/Data/MySQL/Resources/RegionStore.migrations
+++ b/OpenSim/Data/MySQL/Resources/RegionStore.migrations
@@ -562,8 +562,8 @@ COMMIT;
 
 :VERSION 66         #----- add PBR Terrain storage column
 BEGIN;
-ALTER TABLE `regionsettings` ADD COLUMN `TerrainPBR1` varchar(36) NOT NULL;
-ALTER TABLE `regionsettings` ADD COLUMN `TerrainPBR2` varchar(36) NOT NULL;
-ALTER TABLE `regionsettings` ADD COLUMN `TerrainPBR3` varchar(36) NOT NULL;
-ALTER TABLE `regionsettings` ADD COLUMN `TerrainPBR4` varchar(36) NOT NULL;
+ALTER TABLE `regionsettings` ADD COLUMN `TerrainPBR1` varchar(36) NOT NULL DEFAULT '00000000-0000-0000-0000-000000000000';
+ALTER TABLE `regionsettings` ADD COLUMN `TerrainPBR2` varchar(36) NOT NULL DEFAULT '00000000-0000-0000-0000-000000000000';
+ALTER TABLE `regionsettings` ADD COLUMN `TerrainPBR3` varchar(36) NOT NULL DEFAULT '00000000-0000-0000-0000-000000000000';
+ALTER TABLE `regionsettings` ADD COLUMN `TerrainPBR4` varchar(36) NOT NULL DEFAULT '00000000-0000-0000-0000-000000000000';
 COMMIT;
\ No newline at end of file
diff --git a/OpenSim/Data/PGSQL/Resources/RegionStore.migrations b/OpenSim/Data/PGSQL/Resources/RegionStore.migrations
index 0c89495036..7b86e28f04 100644
--- a/OpenSim/Data/PGSQL/Resources/RegionStore.migrations
+++ b/OpenSim/Data/PGSQL/Resources/RegionStore.migrations
@@ -1262,8 +1262,8 @@ COMMIT;
 
 :VERSION 54         #----- add pbr terrain storage
 BEGIN;
-ALTER TABLE regionsettings ADD COLUMN "TerrainPBR1" uuid NOT NULL;
-ALTER TABLE regionsettings ADD COLUMN "TerrainPBR2" uuid NOT NULL;
-ALTER TABLE regionsettings ADD COLUMN "TerrainPBR3" uuid NOT NULL;
-ALTER TABLE regionsettings ADD COLUMN "TerrainPBR4" uuid NOT NULL;
+ALTER TABLE regionsettings ADD COLUMN "TerrainPBR1" uuid NOT NULL DEFAULT '00000000-0000-0000-0000-000000000000';
+ALTER TABLE regionsettings ADD COLUMN "TerrainPBR2" uuid NOT NULL DEFAULT '00000000-0000-0000-0000-000000000000';
+ALTER TABLE regionsettings ADD COLUMN "TerrainPBR3" uuid NOT NULL DEFAULT '00000000-0000-0000-0000-000000000000';
+ALTER TABLE regionsettings ADD COLUMN "TerrainPBR4" uuid NOT NULL DEFAULT '00000000-0000-0000-0000-000000000000';
 COMMIT;